Right now, Bitcoin is going up a lot. Look at the chart, we are in BTC pump phase. We're waiting for Bitcoin to start going down a bit (first distribution phase). Some investors will take their money out and put it in their bank accounts. Others will put their money in altcoins to make them pump in price.
Remember, all coins will go up, but some will make more money than others. Also, look at the percentage of profit from the lowest point, not just from when you bought it. Sometimes a coin only goes up 10% from when you bought it, but it's already gone up a lot for people who bought it at the lowest point. They might sell soon, so it's a good time to get out too.
Have fun making money!