The golden maxim is don't invest in what you don't understand well. If you don't know ETH as intimately as @mining1 does and don't feel the urge to be one his flock, then leave that on the table for others.
I prefer to invest in what I believe in. That which I think will be very important.
Bitcoin has that attribute, but Etherem et al are just shitcoins to me, because I am a developer and I understand the technology. @mining1 sees it from a different perspective than mine. He sees hype coming and a lot of fanboys who will wet their pants. He is probably correct, but I don't care. I invest in what I believe in and understand.
I don't think Monero is a shitcoin, but I haven't looked at the chart and sentiment lately so I can't give any recommendation on what price to buy it. I had advised to buy it right below it made its huge run up. But I am ambivalent at the moment (mostly for lack of time to think about it and also because our ecosystem is a cesspool so fundamental tech may not matter).