I was 100% out of stocks at beginning of March 2020. In May 2020 I was 100% back in stock index funds. It was NOT skill. It was pure luck.
2. I made the shrewdest real estate investment of my life just before the 2008 fiasco.
3. Except in rare cases where I sold an asset at a loss for tax reasons, I have never lost money on an investment.
None of this was skill, and yet there wasn't much luck involved, either. The only two attributes I brought to the table as an investor were discipline and patience. Being methodical is far more important than being "smart" in investing.