Bitcoin based investment opportunities don't have much grounds. The main reason being the limited supply of Bitcoins. No genuine project can pay you dividend in Bitcoin for long term. You may find few projects online claiming fixed returns but they are ponzi scheme that run away after few days.
Such concept may be possible for altcoins like PoS based masternodes. You can get dividend in terms of such altcoin. But the value of most of the PoS coins fluctuate too much that even with dividends, the total net worth may decrease in the terms of fiat over the period of time.
So it's better to do crypto trading and grow money in terms of fiat than try increasing them in terms of crypto only.