I'd say currently bitcoin is one the weakest currencies in the world, but this can (and hopefully will) change in the next couple of years.
If you say bitcoin is the weakest currency, I don't feel comfortable with that. In fact, the price of bitcoin now 2800-2900 USD. It is not a small amount. The market cap is about 70 persen from total 21 million. There would be deflation so the bitcoin price will be more stronger than now. If people out there know bitcoin then they buy some, How much will be per satoshi? I can't imagine if the market cap reach 90 %. More people will hold bitcoin but in small amount. However, the price will be so high, this is my opinion.