Here are the best stocks to buy if you want to add Ethereum to your portfolio:Grayscale Ethereum Trust The Grayscale Ethereum Trust (ETHE 3.76%) is a managed fund that makes it easy to add Ethereum to your brokerage account. Each share is backed by a fixed amount of Ether tokens (approximately 0.01 Ether per share).Keep in mind that the fund's share price is often lower than the value of Ethereum at the prevailing conversion rate. Grayscale also charges a somewhat expensive annual manage...