You are actually correct, Bitcoin is a very volatile asset that is to say that it's variation is unimaginable or let me say unpredictable but however, it has sequence it moves and Alt can not or should not be compared with Bitcoin because most or if not all of them depend on Bitcoin. Lastly, I believe Bitcoin being risk free have been discussed about, the fact that Bitcoin has a great potential doesn't mean it is risk free or it's certain, the fact that I'm investing doesn't mean everything is certain or guarantee but one thing I know for sure is that Bitcoin is wey better than any other coin as speak and i believe I will make out something big in years coming.
Sticking with investing in Bitcoin will surely improve in the future, because it is a very good time to be where we are in terms of Bitcoin price. This is the best time to invest in Bitcoin, because in the month of October, the price of Bitcoin has only been dumped and dipped twice, but never down to a small dip.
So those who have been waiting to buy a dip in bitcoin, their biggest opportunity is gone because the probability of bitcoin price retracement is very low (the probability of bitcoin price reversal or dip is very low). So there is still enough time to invest so it is best to wait long time before investing in bitcoins.