What do you guys think about my strategy?

Lol.
A person who has supposedly "accidentaly" made over half a million dollars and not only openly discusses it on a forum but also and asks for advice, like a begginer who asks for advise on how to invest $200.
Are you part of some European royalty?
My advice. If you don't need that money, invest it in Bitcoin and forget about it for at least 4 years. If you are so nervous and have sold early, you probably need that money more than you think, and you shouldn't invest so much.
A newbie can hit millions in a first time investment that doesn't give them the experience of someone who has been in crypto for years, perhaps this is the @op first investment at the time the market was bullish and he got lucky,
there is a difference between being lucky and having experience overtime, same situation the @op is going through happened to a close friend, he made a good amount back in 2017 but lack of experience made him lose it all, maybe if he had sought advice from experienced folks he would have made a better decision.