Bitcoin will always be the most profitable token to invest out there. It yields returns for as much as 30-50% in a few months and it comes better with age. Ethereum can be an option but the pricing for me is a bit way too stiff and the pricing won't even budge in a month. There are so many good token in the market which is promisng such as Waves,OMG, Steemit et al. Invest on bitcoin and altcoin for maximum profit.