$10

@lostnuggets + Coinbase

This is one of the largest crypto trading/banking websites around and they currently have a $10 in Bitcoin as their sign up bonus if you deposit $100. Through their "learn and earn" program, you can also make up to $30 in other crypto currencies after watching a few videos and taking a short quiz on each currency. Important to note that while it's a trading platform where you can send and receive crypto currencies, it's not actually a wallet and you'll have to research and create one if you want to keep your crypto currencies more secure.