A few reasons why Bitcoin is not an investment.

Bitcoin represents a gradual replacement of the catastrophic fiat money monopoly, based on inflation (expansion of the money supply).

Buying Bitcoin is a vote for neutral money that can't be printed, corrupted or confiscated.

Bitcoin is the 'sly roundabout way' by which property rights can be secured in the 21st century, without relying on or trusting a State, corporation or third party.

It represents individuals owning the fruits of their labor, in contrast to owning government-issued coupons that can be frozen and confiscated at any time. This is particularly true in light of Fiat 2.0: CBDC's.

As hard money outcompetes inflationary money over time, and as millions of people align with property rights for all on an open, decentralized network, we both avoid the emergence of a 1984 society, are able to decentralize power and in addition benefit from the network effect of replacing corrupt money.

The long term network effect of replacing corrupt money is prosperity and higher spending power of each unit of money.

Liberty and property rights for all just happens to lead to prosperity. Freedom is more profitable than slavery.

Hence, investing in liberty is the real investment.