iOn a rolling basis, stocks which come in top 80% of total market-cap are considered largecaps, next 15% midcaps and remaining 5% smallcaps. (Total m-cap classification is done on a daily basis).

Ever received a paper token from your next-door paan shop in lieu of a small change, which he would accept the next time you visit him? Imagine that token digitally, and that's your cryptocurrency.