Of course, you can buy and sell crypto (bunch of shitcoins) but not bitcoin. Bitcoin is different and unique for long term investment. I believe that you have almost 100% of your portfolio on shitcoin as a trader that you are. But I bet you, you are doing more harm to yourself and in future you will regret playing around with shitcoin (gambling). Instead of you to use your precious time, energy and resources to pile up wealth for yourself by investing into bitcoin to build and grow your portfolio overtime. Traders end up with little bitcoin in future and regret for trading it all for little daily profit, while investors are the opposite.
People who buy altcoins and sell them in the short term are just wasting their time and resources. They don't understand how what they are doing is just going to inconvenience themselves and potentially cause them to lose money seeing the altcoin market which is so much more volatile and just following the movement of Bitcoin.
They should divert their time and resources to invest in Bitcoin. They can invest in it without being bothered by its volatile price - just need to put it in the long term and adjust it to financial ability, then invest regularly, it's that easy, no need to monitor the market 24 hours a day like what traders do. They can accumulate their wealth and enjoy their growing portfolio.
I agree with you, every coin in the crypto market follows the movement of Bitcoin.
Moreover, most altcoins cannot survive in the long term, and short-term altcoin investments are also very risky, because altcoins are very volatile in the short term.
So in summary, getting something good from altcoin investments is very risky, and investing in altcoins means putting your money at risk. So if you want to invest in a long-term safe coin, you must invest in Bitcoin. Bitcoin is also volatile in the short term, but in the long term, it is an asset that continues to increase in value over time "despite short-term volatility".
So instead of trading altcoins in the short term, invest in Bitcoin in the long term, And don't see the Bitcoin's short-term market fluctuations, just Continue to invest in Bitcoin consistently in long-term DCA. Invest Bitcoin patiently without going through unnecessary complications, This will able to definitely give you the best results.
That statement is most likely insinuating that some altcoins are better than the others, that is you are kind of given credit to some altcoins not being shitty like
the others perhaps, have you also consider the challenges of attempting to figure that out? Bitcoin is the only one coin I know that stands or represents long term potentials which no other coins can not or have nothing to be talked about.