My investment strategy is
Learn TA and market structure
Research which projects are likely to do well when the market goes bullish again
Buy as close to the bottom of the market as possible possibly use a DCA method of investing
Have an exit strategy in place and don't be afraid to take some profits on the way up
Place some of those profits into passive income like staking decent projects or a masternode coin with a good team and ecosystem intent on creating a use case - one that has also stood the test of time.
The rest of those profits I would hedge into a stable coin and wait for the next market bottom to reinvest - (rinse and repeat)