Your examples are not examples of the problem with gold standards, but the rather the problem with fractional reserve banking, which is virtually non-existent with BTC (I disagree with Bitcoin proponents that say FRB isn't possible with BTC-- it'll simply be market based and potentially auditable through the blockchain). My point with 2008 is that it was a problem created by banks/government, which, whether corrupt or whatever, is essentially centrally planned. So I meant to say that while the current system was "saved" by the central planning, you must couple it with the fact it was caused by it, too (or, caused by a failure of it, if you'd prefer).
That's important because it makes longer term capitalization of things like homes possible. If the world was still using gold or BTC as currency, lending would be like it was in the gold era as well -- things like 30 year mortgages that make homes affordable would not exist.
As far as crises go, 2008 was a painful market contraction, but not a panic. Contrast an event like the Panic of 1907, when banks collapsed and many people lost life savings, mostly due to a shortage of short term cash. The nation averted disaster becuase JP Morgan happened to be in town and had enough money and clout to intervene.
In 2008, the Fed pumped money into the markets to allow banks to stay solvent. FDIC made depositors at the few failed banks whole. Thanks to the corrupt perversion of the banking regulations, the "too big to fail" banks required even more extraordinary aid. People were hurt and lost money -- but they did so because their assets lost value, not because their bank went out of business.
Our monetary system isn't perfect by far. But it's much better than the old style gold standards that BTC is reminiscent of.