I prefer on bitcoin because it has a higher value that Ethereum in which you can easily have much money. Particularly bitcoin is not just an easy to get but if you're hard working and patience people it's worth the wait day by day the price of bitcoin is getting higher and higher.
Also we can see similar profits in the case of ETHERUM in few more days or months as ETH can also achieve great heights in future. Surely, bitcoins have a high price which attracts many new investors but also ETH can be beneficial for the future as it has a low price now and can be purchased by any individual.