If you are looking for best coin to buy or invest i will advise you to go buy bitcoin.
I think bitcoin is not that too expensive compared to when it has already gain 109k as ATH, if you invest now there is every tendency the market would soar above the previous ATH and there is every chances for you make double of what you have invested in bitcoin.
Sincerely with the way altcoin are not performing fine this period it would be better to hold only bitcoin with bitcoin you wouldn't be that disturbed about market changes.
I think this shouldn’t even be a question now except maybe one is definitely a newbie, the bitcoin holdings over the years has proven its reliability of actually growing in profit when bought and hodl for long. As for Altcoins I think this particular period is clearly a wake up call for the holders that most of these Altcoins are not worth the hodl because most of them are usually headed to the bottom. In the past when there was few Altcoins there was Atleast more funds or liquidity to buy but right now as there are duplicates of these Altcoins which means plenty of shitcoins many people lose more money on pump and dump coins by holding them like investments.
In the past there is this called an Altcoin season right now I tell people that most of the coins they are holding for Altcoin season will never go up again so the best thing is to take loss on project who looks dead and invest in only bitcoin as it is the only crypto coin worthy of been called an investment