Sort:  

The other Piggy uses its own blockchain, the one in your Ethereum wallet is "mine".

is it possible to sell my coins ? @drpig

Sure, you can sell them on EtherDelta: https://etherdelta.com/#0xc6b1953ab35f05db745dadd5ce411d75758a7898-ETH (at current prices, though, it's more fun to hodl them :))

Coin Marketplace

STEEM 0.27
TRX 0.25
JST 0.039
BTC 94256.05
ETH 3358.02
USDT 1.00
SBD 1.73