The Most Promising Cryptocurrency Investments In 2021 As of 2021, about 6,000 cryptocurrencies have emerged over a decade after the first digital currency, bitcoin, was invented. They continue to make headlines about their sharp spikes and falls. In numerous ways, investing in cryptocurrencies is similar to traditional investments TL;DR What about me, I prefer Bitcoin. Source https://blockster.com/blockdesk/1403_the-most-promising-cryptocurrency-investments-in-2021