The best time to buy bitcoin is now. Traders should prefer to go long or buy instead of going short, but going short is also good if the signal really suggest bear market. But all I am thinking that would happen next month is that bitcoin would increased, get to $20000 and increase above it.
Currently, the price is over $19k. I think this is a little bit high and not really the best price for buying. Also, you said earlier that bitcoin price can't go beyond $22.8k so it means that we will only see a downfall below $19k. We better wait for that.
You can't just say that traders should go for long term because they choose to be a trader anyway but traders can buy at any moment because they can ride the market volatility not like to those who invest for long term that they avoid the volatility because they think it was too risky. I think bitcoin didn't hit $25k last august but it was only close to that. $25k seems the ultimate resistance right now.