I like this sentence fragment "I did dabble with altcoins and learned soon after that it was a mistake, it wasn't slow". Currently, many altcoins seem to have reached the bottom of their market cycle and many still like to spin in altcoins during reversals.
Mostly people who dabbled in altcoins ended up having their same hands burnt. Altcoin investment is driven by the fact that early bitcoin investors are if still holding their coins, millionaires at the current price. They think that same price rise is coming up for altcoins, but this is a wrong assumption. Bitcoin is one of a kind and its success will not be replicated by any altcoin, whatever their vision might be.
Eventually these people understood their folly and moved away from cryptocurrency and not even bitcoin was touched by them. Those who have been in this community for long know what potential bitcoin has and hence it is the only coin to buy.