That is a good way to maximize your profits with bitcoin and to lessen the risk investing in altcoins. Bitcoin has been hitting the highest market demand so investing in it for long term could only mean huge profits in the end. As well as ethereum, its investment potentials can never be underestimated because it has multi purposes. One can act as money, and as a good store of value. And the fact that it has the most secure blockchain network that makes it more reliable to invest.