Lol 😂 I sold BTC at ~20k and bought back in at 6.3k (and BTC is just one of the many coins I'm holding). How is this a bad move? I've been trading and mining altcoins since late 2014. You don't know what the fuck you're talking about. Stick to leetcoding.
I'm trading btc solely due to price volatility. A lot of FOMO sellers drive the price down, I buy at a discount and sell at high tide. Rinse and repeat. My biggest winners in the past have been XRP, XVG and LTC.