I never regret investing! The only thing I regret is holding my non staking coins as long as I have. They do nothing for me except go up and down in the market. Starting using POS, staking NEO, ONT, QTUM, and PIVX as well as mining. So now my HODLings are making me dividends. My only regret is not doing this sooner. Oh and also investing in Steem! Wish I would have started this way sooner.