IMHO, bitcoin is a possible alternative to government issued paper money and might well retain purchasing power in a future in which paper money was rapidly inflating to worthlessness.

A merit of bitcoin is that governments cant print more of it.

It is however a new idea and might well fail or decline in value. It would be most unwise to put more than a small percentage of ones money into something so new and untried.

A SMALL holding of bitcoin is arguably sensible, just as one might might prudently keep a modest stash of foreign banknotes.
Similar arguments apply to a modest holding of gold.

Foreign banknotes, gold, or bitcoins, should IMHO be regarded as insurance or as doomer preps and not as investments. They pay no dividend, and carry risks of loss, theft, or devaluation.
Could be valuable though if ones national currency lost value or became inaccessible.