Actually, the return which these two will give in future depends on a number of factors. For instance, there is news that Google is going to ban crypto related ads and this will affect the prices of both bitcoins and ethereum negatively. If there are improvements in ethereum scaling issues, it may even take over bitcoins. If it is able to do so, you will see dramatic increase in the price. Thus my advice is even if you go with bitcoins, invest at least some money in ethereum as well for diversification.
Do not put all eggs in one busket is a good idea. I have a bit ethereum too. Bu bitcoin will be always the first. Ethereim costs enough already right now. Better seek chipper shitcoinds instead. Some could shoot oneday.
Do some other way this is some of the good things that we may have to encounter and do also for cause we all know that we have some differesnt strategy here that we can actually take for just like here in this curresncy better to have the great things to be for.