$BTC
How the capitalization of TOTAL2 altcoins behaved after the completion of these periods - can be seen in the chart. In the vast majority of cases, active growth began. Although there were situations of long declines, they were more common before 2020.
Now the index is at 18. It is assumed that the start of a new wave of active growth in altcoin capitalization will occur - when it returns above 25.