Some points of skepticism about RH crypto:

1. Their market orders have a 1% up / 5% down collar, which means you might have trouble executing orders sometimes. Not a huge deal as you should be using limit orders anyway... but if you sell at market price, you could be selling 5% below ACTUAL market price.
2. Their charting is absolutely horrible
3. You can't move your coins around; can only hold them within Robinhood.
4. Following the above, this is indirect crypto asset ownership. You do not control the coins you're buying at all.

For what it's worth, this feature is more for existing Robhinhood users to be able to touch crypto. It really isn't enough to bring existing crypto people to their platform.