Is 12-word seed phrase safe enough? Is 12-word seed phrase (as used by Electrum for example) safe enough for generating an offline wallet?

My understanding is this: 2048 words pool make 11 bits of entrophy per word. 12 words in seed make total 132 bits of entrophy.

Is this considered safe enough?

I'm not talking about being quantum-computing-resistent, just being infeasible to crack using brute force given the expected computing power in the foreseeable future.
Is this considered safe enough?


Nothing is "safe enough" if we do not know the cost. 

OK, if you have $100k in bitcoins the 12-words phrase is safe enough.

If the 12-words phrase is the seed to the "Method of destroying the Universe" I would recommend to add at least 11 bits of entropy and use 13 words.