While any Altcoin is swayed by the overall market, finding an Altcoin with a large market cap and large trading volume should be a good estimator of stability. For the cheap mid-price Altcoins, something like Ripple is pretty stable. For the even cheaper coins, you can never go wrong with Dogecoin.
Even most of those altcoins with the high marker cap were red for some days together with bitcoin. The goal is to find an altcoin where I can hide my money from those dumps. Ripple performed greate this time but I see no guarantees that this coin will do the same at the next time.
I see the development of IOTA is experiencing a pretty good rise and promises. so it is very good to rely on this IOTA and make it a very reliable mainstay coin to continue growing. so that this coin can be categorized as a coin that is very capable of stable and future pricing.