2021 is a year of learning

In 2021 I learnt that:

1) Options is a great way to earn more money.
2) If possible always sell cash secured puts and covered calls.
3) If stock prices move too far past strike prices, buy back the option then sell another option for a later date and different strike price, at a premium that can cover the loss from buying back the option.
4) S&P500 ($SPY) is a brain-dead way to make money, fire and forget.
5) Buying stocks and just holding them for years is a chillax and stress free way to invest.
6) Don't day-trade. 99.9% of investors who try to time the market to buy low sell high will fail. Just hold or buy $SPY.
7) Cash is trash. INVEST NOW.
8) Don't blindly follow investment influencers or YouTubers. Follow ok but not blindly. Their lives are different from yours, so their choices will be different from yours. They can sell cash secured Telsa puts, you might not and think you want to sell that using margin, you're heading for trouble.
9) Buy crypto, you never know.
10) Sell in May and Dec.