Just install local wallet and forget about it.
That works if you can get your coins out of the exchange, but currently it is not possible.
I want to trade them as well, not just store them on an exchange.
But... Cryptopia is not only exchange with SIGT now. You can trade your SIGTs for BTC then move them to another exhange, trade BTC for SIGTs, then move them to local wallet. 15 minutes and even with profit, possibly.