the best altcoins to invest in are top altcoins that had proven their worth of investments like Etheruem, Ripple, NEO, LiteCoin and other top altcoins that will surely offer higher return og investments in the next few weeks or months.
other than that, there are also more promising new altcoins that I am investing since last year, Oyster Pearl PRL is one of the most undervalued and underrated Altcoin in the crypto market today so you better try to have a little research PRL because it has a nice and unique project that would be useful for internet users in the next few months from now.