The main goal of a Bitcoin investor is to invest for the long term. However, some people may not understand the value of their Bitcoin investments and end up spending their money on things that won't bring them profits in the long run.
As we've seen, Bitcoin has proven to be a good investment over time. Even when the market is down, some investors use this opportunity to buy more Bitcoins and increase their holdings. Only those who don't understand Bitcoin would sell out of fear.
New investors should focus on buying more Bitcoins instead of spending their money on unnecessary things. The people we surround ourselves with can influence our investment decisions, and fear can lead to selling at the wrong time.

To avoid making costly mistakes, you can conder,
 Keeping separate funds for expenses and emergencies
 Seeking financial advice from those who have been in bitcoin investments for long.  Making informed investment decisions

Even though everyone must make their own decisions, but being informed and patient can help you succeed in the long run.