If we have more fund, than is better to invest in both Eth and bitcoin. As invest in both is more low risk than only invest in one.
Buying of ETH and that too at time when the market value of ETH is not that much high is a very good idea and that this can surely help you in having lot more earning at the end and that you will then be able to have more money. However, before investing anything into it, you need to learn all the basic things which you need to know as having a good knowledge can help you in doing the things in a better way.