Trading on a crypto exchange group

Q: I have a question about a certain crypto exchange group called “mega”. Basically it’s a group that trades in a platform called “2139 exchange”. Me and my friends group joined this group because we did our research and we didn’t find anything haraam concerning it. But now I’m having some doubts. 

Basically a certain individual studies the market and predicts the direction of a certain currency and makes profits through the price fluctuations. The participants can join the trade through a futures feature and get a profit but he takes a percentage also when the participants withdraw their profits he also takes a percentage. So I want to know if it’s halaal or haraam because I heard some people saying it’s like gambling. 

Revoking a talaaq

Q: I gave 1 talaq so far to my wife. Now I don't have intention to give the 2nd. But I am not having intercourse for the last 2 mensuration periods that passed. Please advise whether the relationship is still valid?

Issuing three talaaqs in the absence of one's wife

Q: I constantly have waswasa regarding different things, such as fears of losing important things and intrusive thoughts about divorce. 

Recently, while driving alone, I had thoughts of talaq, and I became worried about accidentally uttering the word and losing my wife. To counter these thoughts, I ended up saying the statement three times "main tumhy talaq deta hon" with my wife's name, thinking it would stop my mind from repeating it in front of her. 

However, I later read that divorce in isolation might still be valid. I also consulted an Imam at the Masjid, who assured me that the talaq is not valid. I would appreciate your opinion on this matter.