Right its actually a good idea. Bitcoin is slowly increasing in value and with that, the value of other altcoins will also goes with it. Its just a matter of picking the right altcoins. Look for some with potential and and a long term goal. Buy as many as you can in a small price then sell it when the value of bitcoin increases. You can wait for a long time or you can also do the buy low sell high strategy.
Whenever bitcoin price goes up,for sure altcoins will follow and with this trend now in which many are talking about bullrun(well i am not sure but it looks like close to being bull)i guess it's better for us to buy small amount of each altcoins that we wanna buy(only those with potential and not those shits)to let sitting in our folios and only the amount we can afford to lose since we will just bet for them as we.are suspecting bull is here.then if we fail atleast small amount had been loss but if ths market continue to pump then we will buy.more and more