"In 2020, the world started to understand the intrinsic value of bitcoin as “digital gold.” In 2021, we will witness the same understanding of Ethereum as “digital oil.” In the next year, Ethereum will solidify its place as the future substrate of the global digital economy by underwriting the world's contracts" Prediction by Andrew Key, the Managing Partner at Digital Asset Risk Management Advisors (DARMA Capital).
So going by his lines, I think Ethereum will become the next big thing after Bitcoin in crypto currency.
So I think people should start investing in Etherium.
If you are looking for trading in cryptocurrency, I would suggest you check out Exocrow, a digital currency wallet, and platform where merchants and consumers can transact with new digital currencies like bitcoin, ethereum, and litecoin.
I have been using this platform for trading in cryptocurrencies and made a lot of money on it.