Hi @wiseagent,good analogy with the house of cards.
Thinking about that possibility, that it could all disappear from one moment to the next can make anyone's hair stand on end, especially if they are dependent on this.
But, for now I see it a bit difficult, that it disappears completely, not for now, although the cards are always stacked.
The security of the exchange houses are another issue, it is a reality, nothing is 100% safe, however, it is much more comfortable an exchange....