I think I lost the crypto I had in my stormgain exchange account (StormGain has migrated its operation to the platform powered by YouHodler)
From now on I think I will only use exchanges that are on the top 50 or 100 by volume... or if you have other suggestions/filters when choosing an exchange?
Never heard of that exchange before, (and I do think that majority of us here as well). Not sure though how you lost your crypto, and if they migrated it's operation, haven't you been notified by the exchange thru email?
Anyways, others have said, to look for top tier exchange only, maybe this is a good start,
https://coinmarketcap.com/rankings/exchanges/