2) Buy bitcoins on kraken
3) Withdraw your bitcoins from kraken to Poloniex (biggest altcoins volume market)
When you want to cash-out :
4) Sell all your altcoins on Poloniex for bitcoins
5) Withdraw your bitcoins from poloniex to kraken
6) Sell your bitcoins on kraken
7) Withdraws your $$ from kraken
I was thinking off this but if say BTC dropped massively you could loose the value off your Altcoins when converting them to to BTC then to dollars. I thought what if you convert your altcoins to USDT as that matches the doller then convert the USDT to USD?? i might be wrong im still new to this