Not pretty sure what your question is so I suggest you read [1] https://cryptosec.info/ given you have decided to invest your money in bitcoin for the long haul. Remember that maintaining your financial security and handling it responsibly should and always be your utmost priority.

While I know that these are the common scenarios from before and could perhaps happen in the future, but still, be wary that there is still a chance that bitcoin would not go up in price. I mean we can't certainly know if bitcoin will reach a hundred thousand valuation in the next decade, or in the next 20 years.

I am not saying that it isn't safe but you have other options to diversify your money other than bitcoin. More importantly, invest what you cannot afford to lose.