As others have said in this thread, Robinhood provides a great temptation to gamble. Yesterday before the close I gambled and bought UVXY, then sold at the market open today for a gain of 66%. (I posted this confession in another thread) That being said, it was a small amount of $ and I'm fully aware it could have gone the other way.
I've found Robinhood a good way to get the feel for a few stocks, and the bonuses over my normal Fidelity account are a) no transaction fees and b) no waiting 3 days for sales to settle before being able to buy again. It's been kind of fun. Most of what I have is sitting (relatively) safely in index funds, and watching a little bit of cash gain (and lose) in Robinhood has satisfied my urges to own a few individual companies.
I do appreciate the couple of people who have used my referral link. I have no way to thank you individually, so if you're reading this please take it as such. This thread is a great way to spread the wealth around the community.