First of all, I don’t mean Robinhood the vigilante, the hero. Sure, was a criminal, but at least he was fighting against the bad guys. In an unjust agrarian society, his actions could be seen as defensible, but I digress.
I mean Robinhood the investment app. A few notes on its danger:

• The Robinhood app is gorgeous. It’s so pretty it’s hard not to look at it. The graphs and charts are perfect, the animations and gestures are seamless, the design is minimal, it’s about as well designed as apps come. The old mantra ‘beauty is only skin deep’ applies here. The beauty draws you in but also masks some sordid parts.
  The beauty of Robinhood masks the fact that it’s essentially a place to gamble. Sure, you could call it sophisticated gambling, at least you’re not sitting in the smoky haze with eyes glazed over at a shiny slot machine, but it’s still gambling. The little news tidbits aren’t going to help you beat the market, nor will the pretty charts. The truth is that even professionals don’t beat the market. The beauty and ease just make it more tempting.
  Robinhood will you trade options, which is an even riskier way to invest, and even more likely to lose you more money. An option is just a leveraged bet on the market, like putting your money on 13 at the roulette table. It’s a terrible idea.
• Robinhood offers free trades, perhaps its most alluring selling point. Purchasing stocks always involves fees, brokerage fees, trade commissions, transaction fees, etc. Brokers who conduct trades charge fees, usually per transaction. Robinhood is one of the few places where consumers can purchase shares without transaction fees. So it’s beautiful and free? Who says no to that?
  It’s not entirely free. There are regulatory fees on every trade which Robinhood does pass on to customers. These fees are typically fractions of pennies, and Robinhood rounds them up to the nearest penny, pocketing the round-up of course.
  Robinhood also generates substantial income from a practice called ‘payment for order flow,’ a controversial industry practice interestingly invented by Bernie Madoff. It basically means Robinhood sells the right to execute customer trades to third-party market makers who pay a small fee. Those small fees add up, and Robinhood relies on their high-frequency traders to make it work. Regulators don’t love it, in fact, other brokers and market makers have faced lawsuits over the issue. Robinhood’s dependence on this income could spell its downfall in the coming years.
• Robinhood only allows you to buy entire shares, which are often pricey. At the time of this writeup Apple is trading at around $200/share, SPY (a very popular ETF that tracks with the S&P 500 index) is trading at about $300/share, Tesla is at $220, you get the idea. Not all shares are that expensive, but it’s tough to deposit a small amount and get trading, you need more money to buy full shares.
  It’s not like Robinhood couldn’t offer partial shares, other platforms do it. Robinhood doesn’t because this is another one of the ways they make money. Offering full shares exclusively means that you will usually have some leftover change in your account, and Robinhood earns interest on those leftover funds. It also encourages you to invest larger chunks of money, which means you’re likely to lose more money.

I’m not saying you’ll die young or retire destitute if you invest some money in Robinhood. But just be aware of what you’re doing. You’re gambling. For the most part, it’s best to stay away.