BlockFi is legit and it is available to investors worldwide. You can withdraw your assets at any point, just keep in mind that you can make only 1 free withdrawal per month. The funds at are held by the Gemini Trust company, which in turn is regulated by the New York Department of Financial Services.
Coinbase Pro is a trading platform for individual traders and crypto enthusiasts. With a account, you can track the market, view trading history, monitor open orders, manage multiple portfolios, and more.