As a matter of fact, it's very unsafe to depend on a single coin.
Not to Bitcoin.
In otherwords, invest into more than one token by spreading your investment into potential coins but be careful not to invest into pump and dump coins. Above all, make sure to maintain risk management in which ever crypto asset you are investing in.
I get this and it's more of being concerned and to diversify. It's a good strategy but you don't have to diversify a lot. I've seen people that have been following this strategy but then, when you get to see that strategy followed by them. You might be disappointed because they do follow a lot of communities and altcoins and it's not the type of diversification that you may want to see on them but on me, I don't do that.