Thanks for all you replies. I did not expect so many useful advice.
It is really not easy to make decisions, especially with the 'high' price nowadays.
I bought last week at like 4400USD and it was really a big step to do, since it was ATH.
We all now the prices from yesterday and the correction (?) from today, but I'm still buying more.
The last days I waited with the 'hope' that the price will drop, but every day the prices increase.
I spend many hours reading topics and the future is hopeful.
Of course I missed the train from earlier this month and previous years, but I still think it is a good move to make an investment.
Thanks again!
After this, the price might be a little wavy but it is bitcoin so it will be normal.
Don't panic in any cases that will happen. Since you can wait for a long time when your money was still in the bank and never really used it, I think you could also have some patience with the waves that will happen.
Let us just hold for a while and if you think there is profit that satisfies you then you can withdraw.