If you try to invest in a short-term strategy through trading when the market fluctuates in price I find it very effective. Because Bitcoin is bullish and making a lot of impact on the crypto market during the time of the epidemic. 500 $ I think is a good amount.
You do not invest in short term, you trade in short term while investing is used for holders. Also what you said is true but it is just because we are still in the bullish trend. There will be a time the bearish market will occur, also know that even there are times the market is not that bullish and bearish but making short term trading still risky. I am not disputing short term trading not to be good but we need to be careful as it is more risky than beginners can think of.