Poloniex came under fire after a major security breach wiped out more than 12% of its bitcoin. Since the 2014 hack, the broker has been slowly rebuilding its reputation on the security front. On the face of it, Poloniex has sound security protocols given that the vast majority of its customer deposits are stored offline. Poloniex also runs auditing programs 24 hours a day, 7 days a week, 365 days a year. It’s their job to report and block any suspicious activity. Like other exchanges, PolonieSee full review

Bitcoin is the choice of mine as it is the most secure cryptocurrency with a blockchain history of more than 10 years, the only problem for me with the blockchain is that the 10min is too long of time for me, for every single block.See full review

As am exchange, this is my main choice, as they have a great process of trading and also customer support. The customer support line is really great and help you through all of your problems. See full review