Assets being stopped for trading occurs in all markets, including in the highly regarded US stock market.
You wanted to participate in a pump and dump, and now you are angry that you couldn't do the dump. You thought it was easy money, well, now you know one aspect that you didn't consider (that selling might be suspended)
I'm not saying this wasn't risky or dumb, I'm just saying the US stock market is a poor counter-example because both of the things that happened in this case are exceedingly unlikely to happen on the US stock market.
Plus, a company can (hell, typically does) release news after-hours and leave you in the lurch, or go suddenly bankrupt. Ask me how my couple dozen Lehman Brothers shares are doing...
No such thing as easy money.
This happens all the time, a ticker will get halted for a time and no one can trade them even though the market is open.