Please keep your alts , dont sell now.. otherwise you will suffer.
Again you are making the same mistake that hundred of other traders before you have done. When the bullrun starts, it is time for holders to sell and when bear run starts it is time for holders to buy, just another way of saying buy low sell high.
So if the altcoins are rising, you should sell them and exit them finally. I believe you have faith in some altcoins so you would not sell them, but understand that cycling the coins between the highs and the lows is as important as holding them. These coins will never go too high because someone will sell and the prices will drop again. Do not get into the wrong idea that if you sell, it is gone forever because that may be true for bitcoin but always false for altcoins.
So sell some before the bullrun stops and then you can buy them back at lower price if you wish to. Because this is a continuous cycle, you have to be active here. Unlike bitcoin holding where you can sleep soundly after having bought bitcoin at three digits.