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.
Investing in Eth will always be good idea for me and a good strategy. Aside from it (the ethereum) leading next to bitcoin, eth is also good for long term investment because just like bitcoin, it may have dump prices but it will also recover from that and even achieved a higher price. Eth is not just used for investing, it is also used for transactions as gas which helps in the demand for Ethereum. It is my strategy to buy Eth at dump prices because I always used it in exchanges and also treat this coin as an investment asset.