Hello, today I registered on the website and find out that OKex offers you to store cryptocurrencies with interest gain. The ROI is around 1-5% on BTC, ETH, EOS and so on. More in the article: https://medium.com/okex-blog/ok-piggybank-gain-extra-with-your-spare-coins-1efe3c9b37cd Do you know about some other platforms that offers something similiar. Would you trust OKex to store your cryptocurrencies forever?