If bitcoin this month can rise more than 30% then the price of $100k is not a difficult thing to achieve, I'm sure December will soon reach $100k and more headlines and news from various media will continue to report this, and this is a signs that bitcoin was soon accepted in many countries.
These type of predictions are difficult to say. Currently the price is having resistance towards the 50k USD mark. I am sure it will cross but then 60k USD or before that will face resistance. Therefore being able to see the first sights of 65k+ USD this year might not be possible.
Indeed if you want to sell at 100k then it will be long term decision for now. Nobody can predict when it will be reached but everyone is hopeful. You can set your targets lower and be able to recycle the money at a lower target for now like 60k - someone might call this as "scared" but it is a logical and calculated step. There is nothing wrong in using your own wits to manage your funds.
However, there are risks associated with crypto investments, which people are worried of losing their money. That is why it is very important to invest wisely and invest only in bitcoin that has been very stable for many years.
The correct term is buying an altcoin that is a shitcoin. You are not losing money but you are moving to an asset that is way less worthy than bitcoin. Of course that should not be done, but try telling that to the altcoin shills who dont know that bagholders only manipulate them for their own gains.