My strategy in Cryptocurrency to get profit is only to trade, invest and hold only top ranking coins such as Bitcoin, Ethereum, BNB, Polkadot and others. I often participate in Bounty and Airdrop to get money for free, usually when I get a token from the Bounty I will sell it and I will buy the Top coins. That's my strategy, and I'm sure everyone has their own strategy for making a profit here.