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 ?

Why are you surprised xrp dipped 15%. Most alts dump harder than bitcoin at least in usd. Bitcoin goes down in usd and if alts go down even 1 sat they go down more in usd since most alts are paid against bitcoin.