It would be better if people could analyze and learn about bitcoin before deciding to invest in it. With market situations that are always uncertain, potential investors should always be careful in buying bitcoin, especially for small investors because they don't have a lot of funds.
This is always the best thing to do before deciding to invest. In general, no matter how good the investment is, it has always risk. Bitcoin is not different, although we know how much the price started and climbed up to its peaked price, we cant certainly predict the future will be good for investors. Thats why it is advisable to not risk the money that is meant for important things. Anyway, as a long term hodler I dont believe we have to wait for the next halving before bullrun will occur (or we can reach another ATH). The market is unpredicted and the Bitcoin wont move downward consistently since many people will still take the opportunity to buy.