Many people became interested in crypto after the bullrun start, many people want to earn money after they had heard about bitcoin growth. I don`t think it`s a good index, but new people come to crypto and it can help make crypto more popular and demanded
Well people only jump in when the opportunity of earning money is already there. The sudden flow of new crypto users happened on bull runs where people talk about crypto more often. In the past Bullrun like in 2017, I have many friends who got interested and tried using crypto for profits but when the correction happened, Most of them stop using it and totally abandon it. But on this year's bull run, Most of them got back and shocked by the recent crypto prices. My friend regrets abandoning crypto for years and I think this can result for them to use even when the bear market comes.