I invested a small amount in GMT coin today. It's up 182% this morning.
Sell it before it will be dumped again.

I would not be surprised to see this happens with a new coin on binance from binance IEO. It's always getting pumped after listing but for long term and yeah, you can take a look at some old tokens like TLM and many more. That looks like a promising token to hodl but it seems like you didn't aware with the crypto cycle. It will be dumped again once the hype will be done.
The crypto, which was opened on Binance at $ 0.01, is currently at $ 0.23. Is there a future for this crypto or is it just a crypto?
No doubt if it was happening on binance. The future can't be determined easily and you must to do a lot of research to know the fundamental of project. Remember that the hype will always there and we know that so well if binance exchange sites have so many whales on it. They are making money through pumping this token but this is not gonna be a long term pump.
I think you were wrong in your guess, it went up to 0.42 dollars GMT by making exactly x2 from yesterday to today. What do you say, 1 dollar?