Stocks: I have recently become a fan of the RobinHood application that allows free trading without any commissions (see the link above).  At least on a small scale, I think the RobinHood application is very useful for a dividend stock reinvestment strategy that can be slowly scaled up.    

 

Cryptocurrency markets:

The crypto-currency markets are taking a beating currently; nevertheless, see the link above for a Coinbase referral link.