Earlier quoted context omitted.
This could not be further from the truth. If anybody else has the private keys to your coins, you don't own the coins. People have been burned by a countless number brokers. They will not leave their coins with a company such as this. Only the most unsophisticated investors leave their coins with brokers. Anybody knowledgeable enough to invest in multiple cryptocurrencies is smart enough to know they need complete co…
Does your argument still apply if you change "coins" to "cash" and "brokers" to "banks"? I leave my fiat money in banks because I judge that the risk of the bank disappearing and taking my money with it is lower than the risk of my house getting burgled, catching fire, etc. Likewise, it's entirely reasonable to think that a competent Bitcoin broker is more secure and safe than my half-assed attempt to keep my own key…
Done correctly you are absolutely better off with your btc stored at home