Bitcoin is a high risk investment. It's always said with crypto that you should only invest money you afford to lose. Yes, it sounds scary.
Bitcoin has periods when it rises wonderfully and periods when it heads down abruptly. And everything in between. So while some did and will get rich from Bitcoin, others did and will lose greatly.

If one can handle this amount of risk, fine. On the other hand, I would not advise it to somebody in the risk of hearth attack to invest large amounts in it.