It all depends on what you are holding really. If you feel the altcoins you are holding does not have a future and you have the chance to convert them to bitcoin, please do so.

Just like Tom Lee said, if you are not holding at least 1btc, you should be trying as much as possible to see how you will be holding it, before you can even start considering any shit coin you want to buy. Most altcoins will not last and you really want to be careful what you are holding so you do not regret it eventually when bitcoin dominates the market as that time will definitely come.