snip...
I ask for tips from you, how can I be strong enough to resist, and not be tempted by prices that have already increased?
Don't bother to check the market price and never think that you are investing in Bitcoin because at the moment you see it, especially in this bullish time, temptation certainly arises.
But I ask why you should do this. Because there is no wrong about selling as long as we are in a profit already. Besides, there is no rule that stops us from doing this. Well, yeah, it is our choice to still hold and decline to sell. In fact, some people are doing this as well because they don't want to touch their Bitcoin as it was needed already. It is somewhat reasonable, indeed.
However, not taking some profits even if you see your investment has been successful is still not the best idea for me. For me, there’s no wrong in hodling but let me remind that even if bitcoin price is bound to rise high, still we are still dealing with an unpredictable market and that anytime bitcoin price will drop its price drastically more than we can imagine. That’s why I still encourage some hodlers to take profits some time, as we are not destined to keep hodling forever, but we are here in the first place to make some profits and gain even more future profits.