About DASH - I strongly believe that this address XxpMtTNa1RFuSya99A427mTKayGjYQys1v (33500 DASH in it) belonges to Cryptsy
https://chainz.cryptoid.info/dash/address.dws?XxpMtTNa1RFuSya99A427mTKayGjYQys1v.htmIf you look carefully at deposits in it you will see how they came from big wallet who regulary sent DASH to Cryptsy hot wallet (and through branching changes address)- Xqi7sWthYKFPCK3KHcKq8BqY9vMcWy4r3t (5000,7500 or more DASH txs)
is another Craptsy wallet, which makes sense why withdrawals are going to various exchanges...