Many predicts bitcoin will reach 100K, 160K even 200K and more. but no one say what happen then? what happen when reach for example 100K? will be stable, fall to zero, continue with correction or raise more? what is your suggestion

Bitcoin has been consistently gaining value every year and is gaining more investors as well. If you're old enough in crypto space you have probably noticed it.
So, when Bitcoin reach the 6 digit figure then it'll probably rise even more, though corrections and dips are inevitable along the way. Nevertheless, nobody really knows what will happen with Bitcoin in the next few years, but one thing is for sure, Bitcoin adaption will become bigger and bigger each year.