I have around 2.1k in btc rn and was wondering if I should sell it and invest in a couple of altcoin projects, would that be a good idea? I know Bitcoin will never ever do another 5x in the near future haha so that's kind of why I would wanna sell. The market cap of btc would have to reach a very high amount for it to be life-changing money to me.
Sure you can if you want to risk a lot. Altcoins are more volatile than bitcoin. During a bearish phase, altcoins will bleed much more than bitcoin. And it also more difficult for altcoins to beat their all time high again during a bull run. You could have see the last few days how altcoins went down faster than bitcoin. Again, bitcoin already made a new all time high record, but most of the altcoins haven't reached their all time high yet. You might be able to make 5x investing in a new random altcoin, but don't forget, you might be also losing 10x.
I see people referring to the ATH of altcoins to judge, such people will miss out if they do not invest in altcoins due to that and will also cause fear in others from investing in altcoins. Investing in altcoins is good but one has to be smart about it, you do not leave your altcoins for too long in the name of HODLing, that's the gist. This is why we must know the true reversing level on the higher charts for us to know the time to liquidate all our investments in it. Also for altcoins, you do your calculation of the bullish season alone, you do not do the calculation of the effect of the bearish season with it to avoid confusing yourself.
What I mean is that, if you see an altcoin move from $50 to $500 in the last bullish season and move back to about $80 during the bearish season, just buy it when you are sure of the bottom, but never have the mind that it will reach the ATH again ($500) or move above it like many mistakes themselves and others. Just continue to follow its chart analysis to know the true trend it follows and when it reverses. For example, you may buy it at $85 and it reaches $425 max without reaching the ATH again. By then you have gained in multiples, and will still divest if you see the bearish trend activated again. You will now wait till it falls back again to its lowest level in the long-term disposition prior to another bullish season to re-buy it again.
By this, who cares if it gets back to its ATH again? You continue to make your money still, even more than those who are HODLing Bitcoin till eternity. It's all about making money, we should be smart.