In the last bull market, Bitcoin rose from 10,000 to 60,000, and the market value of the altcoins rose from 180 billion to 1.2 trillion, both of which were about 6 times.
Now the altcoins are already around 1.2 trillion, and another 6-fold increase would require 7 trillion in funds.
The difficulty is: when Bitcoin was 10,000 in the last round, expecting the altcoin market to rise 36 times again.