This logo is about trustworthiness and simplicity that will stand the test of time.
When I look the brief, I immediately think about square and x, as well as involving the crypto coin in it . The x evoke 'exchange' and 'trade' between parties. The square evoke 'reliability' and 'stability'. Both of it is essential to our target market, because crypto currency is getting huge, and there is need for a reliable solution for it. I also mention about coin. I put the crypto coin in middle and lock securely inside. This also evoke trust look in the service.
In the end, it's all wrapped up in simple manner.