When you need the money, it can be dangerous. As you might just get to +/- 0 % growth of your investment in 4 years. If it is money you can spare - not a huge problem. However, I would always wait for the best moment in a 4 year horizon. And maybe, this cycle could be extended to a 8 year cycle....
Bitcoin is having its worst week since the fall of FTX https://finance.yahoo.com/news/bitcoin-is-having-its-worst-week-since-the-fall-of-ftx-153406320.html