So you should never be disappointed because you have lost Bitcoin, you certainly have enough opportunities so far. Many people like you have also lost Bitcoin and are currently regretting it, but you continue to hold Bitcoin regularly. However, you should adopt some strategies that will make you financially prosperous in the future, and will be able to eliminate the pain of losing Bitcoin in the past to some extent, if you continue to buy Bitcoin weekly for a long time according to the DCA strategy.
You can be a trader or an investor and engage your trading fund or investment fund with Bitcoin. You can get loss or profit with it but it's none of Bitcoin business and responsibility. You do what you considered as safe and good, so you got what you deserved which can be either loss or profit.
If you get loss, you are responsible for it by your decisions and actions, not Bitcoin. If you want to change from getting loss to getting profit, you must sit down, stay calm, analyze what you did that causes loss and learn more, change your mindset, use new approaches and probably you will get profit in the future.
Again, the profit you achieve in the future is not responsibility of Bitcoin.