But if you will do, you should consider to include other coins.
I might go 50/50 with BTC and ETH.
XRP will be going nowhere, I still can't understand those millions of XRP sending to other wallet and sell to market if the price rise.
XRP is out of league over here as it's too manipulative due to it's unofficial nature of being a centralized crypto rumoured to have been created by banks to penetrate the crypto market and they control it's value by creating buy/sell demands. When it comes to Bitcoin and ETH my preference would be same 50/50 as both are trustworthy and bounces back no matter how hard they fall which is not the case with other altcoins.