4 years ago I bought all Harry Potter movies on Google Play and I tried to access them today… Guess what? All are visible as "purchased" but I can't watch them – only trailer plays. Now I need to complain to customer service and maybe eventually Google will look into it and solve it. Will they though? I need to TRUST in it.
Same is with the money in your bank account, you need to trust that the bank will transfer them when you will ask for it. Same is with the Bitcoin on exchange, you need to trust that exchange will let you withdraw it, when you need it. F*ck Harry Potter, but that's why I use cold wallet for my Bitcoin.