When you want to sell depends on your time frame.
Keep in mind that 90% of all btc already been mined so it will only get more rare over time
If your trying to make some quick money if it hit 47k -48k then it over bought so sell
But if you plan to stay in the market at least 5-10 years then you price target might be 250k -500k
Either way having a portfolio where your not 100% in or out might be the best option.
If it goes up you don't stress about missing out while if it goes down you have some extra money to buy in.
That's a win win
Keep in mind that 90% of all btc already been mined so it will only get more rare over time
If your trying to make some quick money if it hit 47k -48k then it over bought so sell
But if you plan to stay in the market at least 5-10 years then you price target might be 250k -500k
Either way having a portfolio where your not 100% in or out might be the best option.
If it goes up you don't stress about missing out while if it goes down you have some extra money to buy in.
That's a win win