The total cryptocurrency market capitalisation has breached $600 billion. Data shows the capitalisation hit $620.3 billion on Tuesday.On Monay, the overall market cap broke through the $600 billion level before again falling back slightly.

Market capitalisation is a measure of the size of a cryptocurrency. It is calculated by multiplying the total number of units of a cryptocurrency by the current price per unit.

In just one month, the market cap has more than doubled from $232 billion. Among the five most popular cryptocurrencies, bitcoin cash has seen the largest gains, with its value rising by 22% in the last 48 hours.

Less well-known cryptocurrencies such as Hshare and VeChain are also performing well. On Monday VeChain was up 31.88%, while Hshare wasn’t far behind with gains of 28.15%. However, outside of the top 5, some smaller, less well-known cryptocurrencies experienced declines, with Siacoin falling by 10.12%. Power Ledger\'s PWR token lost 8.64% during the afternoon.

Having broken through the $20,000 barrier, Bitcoin pulled back slightly, falling by 3% during the day. However, a final rally helped the currency to recover to a price of $18,951 by the end of the day.