I watched many friends blow tons of money this way. Even I was tempted and squandered a few thousand on bad bets before I learned my lesson. The only investing

I watched many friends blow tons of money this way. Even I was tempted and squandered a few thousand on bad bets before I learned my lesson. The only investing strategy that allows me to sleep comfortably is to buy & hold shares in companies that I wouldn't mind working for. I've also got some small % of the portfolio dedicated to long plays on companies trying crazy ideas that I personally believe in. At no point do I invest based upon time-series data. I simply pick my desired targets and gradually accumulate shares indefinitely. Every time I tried to get more clever than this, my rate of return suffered accordingly.