and also nowadays there are only few that has single coin in their pocket because we knew how diversifiying is the best way to invest.
Diversifying is the best way to invest if you ever have been holding bitcoin and you're satisfied with its amount. Due to that, many diversify their assets and chooses to invest into another altcoin because they think that what they're holding right now is sufficient.
correct as the great day of Single investing(holding) of bitcoin have passed long now and yes we are into Altcoin as well now because there are so much happening in altcoins that has been proven over the years.
sometimes Altcoin is even better for short term than Bitcoin.