I have had real problems with Poloniex and reported about it here in Steemit and Facebook. Nobody was really reacting to it. For me there is no question, the figures on your screen are only figures. These are typical habits of brokers, banks and exchanges, typical. I can explain it like this: When you pay funds into an insurance policy, that money is reinvested by the insurance company into other asset classes, you are left with a piece of paper with writing on it. What can protect you? Multiple accounts, multiple assets, focus on "physical". I have been a trader and investor for 30 years, you can't believe how many times I have been scammed... and lost and lost and lost and lost...