Another story without any proof, I could say that I bought 100 Bitcoin when the price was $100 per coin and now I sell it for $60,000. Wow I'm a millionaire, while the reality I'm still far to reach one million.
Using the word overnight is not correct. Bitcoin is not an investment that will make you rich overnight. You were just lucky to invest when the price was down and the time you sold was when the price increased. It is better to have a long-term plan when buying Bitcoin since you cannot forecast accurately how the market will react at a given time. Newbies should do their research before investing and the DCA buying pattern is highly recommendable.
2 weeks ago, he said we shouldn't invest Bitcoin to get rich overnight and always have a long term plan. But now he's saying Bitcoin can change someone life overnight. Should we say @OP has a
two personality disorder or what?

Investing in Bitcoin with the mindset that you will become an overnight millionaire from Bitcoin before investing in Bitcoin will do you more harm than good. Because we all invest in Bitcoin to make money but there is a right time to make money from investment. When you invest in Bitcoin you must not rush. You should always have a long term plan when investing in Bitcoin. If you want to invest with a small plan then see You won't get paid because of hurry, so you always have to be patient and plan your investment when it comes to Bitcoin. Many times it is seen that we are in a hurry to invest in Bitcoin and we cannot make a home decision due to which we lose our investment attitude, so we always have to have a long term plan, we have to check the market, if we invest patiently, we will get success in the investment.