2. Significant indication of a currency crisis somewhere. Probability unknown, maybe 10%. So 1+2 together =3% chance
3. Some central bank decides to accumulate bitcoin and news of this leaks. Maybe 2% probability, difficult to estimate. This parameter alone would be sufficient.
It is more than likely that ETF could attract $300 million in assets in its first week
and a fact that bitcoin is utilized by fully legalized fund would likely give the price of bitcoin additional momentum.
2. Always a possibility, the problem is that we usually don't see economic collapse until it hit us in the face.
3. I don't believe in this, if central banks hoard bitcoin they won't share this info with general public.