As expected 10-15% dip happened to almost all coins.Im surprised to see XRP 15% dip, btc only 10%.
How far will it go down ?

If these conditions don't return to normal soon, then it is very likely that XRP will drop below 10% of its base price, it really depends on market conditions and the stability that occurs this month, XRP has potential at the beginning of last month, but at the moment they are not so good .
The current challenges of altcoins are greater than stablecoins on the market, this will greatly affect their trading value, if normal conditions cannot be found by the middle of this month, then XRP's chances will be more difficult by the end of this year.