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Elon Musk Archives ✔️ News For Finance
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Dogecoin has risen 400 percent in the last week because why not
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Dogecoin, a blockchain-based digital currency named for a meme about an excitable canine, has seen its price rise by a factor of five over the last week. The price spike has made it one of the world’s 10 most valuable cryptocurrencies, with a market capitalization of $45 billion.

Understanding the value of cryptocurrencies is never easy, and it’s especially hard for Dogecoin, which was created as a joke. Dogecoin isn’t known for any particular technology innovations and doesn’t seem to have many practical applications.

What Dogecoin does have going for it, however, is memorable branding and an enthusiastic community of fans. And in 2021, that counts for a lot. In recent months, we’ve seen shares of GameStop soar to levels that are hard to justify based on the performance of GameStop’s actual business. People bought GameStop because it was fun and they thought the price might go up. So too for Dogecoin.

Tesla CEO Elon Musk may have also played an important role in Dogecoin’s ascendancy. Musk has periodically tweeted about the cryptocurrency, and those tweets are frequently followed by rallies in Dogecoin’s price. Late on Wednesday night, Musk tweeted out this image:

Dogecoin’s price tripled over the next 36 hours.

My editor suggested that I write about whether Dogecoin’s rise is a sign of an overheated crypto market, but for a coin like Dogecoin, I’m not sure that’s even a meaningful concept. Dogecoin isn’t a company that has revenues or profits. And unlike bitcoin and ether, no one seriously thinks it’s going to be the foundation of a new financial system.

People are trading Dogecoin because it’s fun to trade and because they think they might make money from it. The rising price is a sign that a lot of people have decided it would be fun to speculate in Dogecoin.

Of course, the fact that lots of people have money to spend on joke investments might itself be a result of larger macroeconomic forces. The combination of stimulus spending, low interest rates, and pandemic-related saving means that a lot of people have more money than usual sitting in their bank accounts. And restrictions on travel and nightlife mean that many of those same people have a lot of time on their hands.

The big advance in Elon Musk’s Pong-playing monkey is what you can’t see

On Thursday, one of Elon Musk’s companies, Neuralink, posted a video showing a monkey playing Pong using nothing but a brain implant connected wirelessly with the computer hosting the game. While it’s a fantastic display of the technology, most of the individual pieces of this feat have been done before—in some cases, over a decade before. But Neuralink has managed to take two important steps: miniaturizing the device and getting it to communicate wirelessly.

What has been done

Neuralink’s goal is to develop easy-to-implant, compact, wireless brain implants. Initially, these will be used for the obvious goals, like re-establishing some degree of independence in paralyzed individuals. But Musk has made it very clear he sees the longer term goal as making the implants commonplace and able to do far more mundane things, like providing direct, brain-driven control of electronic devices.

For now, however, the early goals are dominating progress. About a year and a half ago, Neuralink showed off hardware implanted in a number of pigs, with them providing real-term data about the goings-on within the pigs’ sensory regions of the brain as they explored their surroundings. At the time, Musk suggested that the team was nearly ready for human testing.

The video and associated blog post released yesterday show that the company’s taken the next intermediate step on the road to human trials: a successful implant in a monkey, which has a brain anatomy that’s obviously a bit closer to that of a human. The video demonstrates that the device works wirelessly, and it’s compact enough to not be visible in the video. The monkey has been trained to play a couple of on-screen games, including Pong, using a joystick.

But by recording and analyzing the activity in the motor-control regions of the brain, the research team was able to play the game using the signals coming in from the brain via the implanted Neuralink device. They could unplug the joystick, and the monkey would continue obtaining rewards by successfully playing the game.

Not entirely new

It’s really cool and looks really impressive. But so does the below video, which shows an implant being used by a human to control a robotic arm. Notably, this video dates from 2012. The actual work was probably done earlier, and there were undoubtedly trials in monkeys well before this. To their credit, the people at Neuralink acknowledge this, writing, “Neuralink’s technology builds on decades of research.”

So it’s worth separating out what represents an actual advance here. The big one (from my perspective at least) is getting this to work wirelessly, which is harder than it sounds. One of the big barriers is the fact that even a single neuron produces a lot of data. Rather than adopting clean on and off states, neurons tend to have a background level of activity, producing a random string of activity spikes even when quiet. And when activated, they simply produce an intense burst of spikes, rather than switching to a clear “on” state.

For a research team trying to understand how neurons communicate through these activity spikes, recording all their details is essential, and doing that for more than a handful of neurons requires a high-bandwidth connection to the electrodes in the brain. Neuralink, however, doesn’t necessarily need all the details, and the company decided it would compress the data by simply registering how often a spike took place.

This aggressive compression of the data was essential to get the stream to where it could transmit data from 1,000 electrodes over a bluetooth link. It was also a bit of a gamble, given that any two spikes are rarely the same in terms of their magnitude, duration, and so on, and there was no guarantee that omitting some of this information wouldn’t omit needed details of the brain’s activity. At least for the motor control region, that gamble seems to have worked out.

One of the other contributors to the success may be the high density of electrodes in this implant (roughly 1,000)—much higher than the ones used in the earlier human experiments. Getting a larger sampling of the activity in the right area of the brain may help make up for the lack of some details. There are likely to be much higher density electrode arrays developed in the academic labs in the meantime, as well, although these haven’t been approved for human use yet, either.

The lack of a need for external, wired connections (for both data and power, the latter being enabled by battery improvements) is part of the key to the device’s compact nature. Advances in electronics over the past decade are also critical.

So, while the video is striking, it’s also exactly what Neuralink should be doing if it’s preparing to submit its designs for human testing. It’s not clear when it’ll have enough data to be ready to talk to the FDA, and it would be really good if the company would put some details of its system into the peer reviewed literature. But at his earlier presentations on the company, Musk seemed to recognize that this would be a long haul and indicated he was comfortable with that.