If you want an investment instrument that is not effected by monetary policy, there are literally millions of such investments. Gold, stocks, commodities, land, betting, and hundreds of other categories.
- You cannot send gold via the Internet. It is not easy to divide it in separate pieces. It is difficult and expensive to transfer. You cannot own exactly 0.01567 ounces of gold. You don't know much gold there is. You cannot have divided possession with gold, and the list goes on and on.
- Stocks can be inflated if the company decides to raise capital, which will dilute the value of the existent stocks.
- Land can be confiscated. You cannot own 12.345678% of a house. You cannot transfer a house unless the buyer will come and live in that location. It is also very expensive to own and preserve a house.
You can buy the GLD ETF at whatever fraction you want, and this is all done on the Internet. But sure, if you don't like gold, there are millions of other investments you can try (and you can buy REIT shares if you want to expose yourself to real estate, for instance). Some instruments will go up in value, some will go down. The reasons for each instrument's performance will always be very complicated.
If you are convinced Bitcoin will go up in value, then by all means invest. I'm not here to tell anybody Bitcoin is a good or bad investment per se, only that it stands along side every other investment out there, and nobody can perfectly predict the future.
Bitcoin is invulnerable to all sorts of previous financial instrument drawbacks.
Lots and lots of investors have been burned throughout the years by being convinced, "it will never go down" when discussing their favorite thing to invest in. I guess all I could say is, be careful with that, and keep a diverse portfolio. No financial instrument is "invulnerable".