What would it take for you to pour entire life savings into Bitcoins?

[muscles]

I'd never put all my eggs into one basket.

I'm willing to bet that almost all your eggs are already in the USD basket...

[Astrohacker]

1. It would have to solve the double-spending problem in a decentralized way (so that it has no single point of failure).

2. It would have to have desirable economic properties, like having a constant number of monetary units, and solving the problem of distributing the initial coins in a reasonably fair way.

3. It would have to show significant evidence of a dedicated and growing developer base (both for the core client and the endless applications).

4. It would have to be undervalued compared to its potential.

...and I actually have invested all of my savings into bitcoin.

[FreeMoney]

1. It would have to solve the double-spending problem in a decentralized way (so that it has no single point of failure).

2. It would have to have desirable economic properties, like having a constant number of monetary units, and solving the problem of distributing the initial coins in a reasonably fair way.

2. It would have to show significant evidence of a dedicated and growing developer base (both for the core client and the endless applications).

4. It would have to be undervalued compared to its potential.

...and I actually have invested all of my savings into bitcoin.

A+