To be clear, I find XRP quite centralize. So I will never invest in it.

Dash does not quite decentralize.

Ethereum seems to be the most appropriate project to invest in any case. Many projects use the Ethereum infrastructure. Perhaps Ethereum may be the best coin to perform its function.
Apart from this, very serious improvements are being made in the Ethereum infrastructure. If these are passed on, the price of Ethereum will increase further. That's how I think.