Lot of ways are there but the most profitable ones in my opinion is investing in dividend tokens . My personal favourite is Earnbet .
Its a casino and a fully decentralized dividend platform that actually pays their token stakers in bitcoin and ethereum as dividends .
I have claimed a total of 855$ till now in 4months excluding this month which Im yet to claim a total of 179$ .

If you are interested in consistent return on investments in prime coins like bitcoin and ethereum .

I would say EarnBet is the answer .

Just search "EarnBet" and you can get the steps to sign up .
Hope it helps !

GOOD LUCK .