It seems we are already in a bear market but how far can this go? A year or two just like 2018-2019? Or this is a short term bear market? MMCrypto on youtube said that 30,000$ BTC is possible, if this do happens altcoins will bleed more than ever and this will unlock the beginning of the downfall of many altcoins.
At this point, we can already say with certainty that the cryptocurrencies are in the bear market. The price of Bitcoin, as predicted by the YouTuber you are talking about, has already dropped to almost $30k, so it became real. I think the biggest question right now is how low the Bitcoin price will drop and could it be as low as $20k? In my opinion, if the bear market lasts a few more weeks then $20k is quite possible.