Over time, there is only one asset that has consistently kept pace with inflation, and that is gold. But gold is not without it's shortcomings. For instance, gold is very difficult to transport and keep safe.
Bitcoin (BTC), alternatively, is digital. So you can transfer it instantaneously with a few clicks of a mouse. (You should store your BTC in an online electronic wallet, and as long as you maintain your private key in a safe place, no one can steal your BTC).
The other drawback with gold is that it won't grow in value in real terms. It just keeps pace with inflation; it doesn't outrun it. The reason being is that miners increase the supply of gold by about 2% per year. So in essence, every 50 years, the supply of gold about doubles. This continuous trickle of supply keeps gold from ever becoming more than just a "maintainer" for the value of one's wealth.
But if you want to get rich, and protect your buying power, you need to own a different asset. That asset is bitcoin (BTC). Bitcoin is a far superior wealth builder and store of value than gold, in numerous, and significant, ways.
First, the supply of BTC is capped at 21 million. Bitcoin miners (creators of new BTC) can not produce extra bitcoins in response to an increase in prices the way gold miners can.
So, differently than gold - which "leaks" about 2% of its value every year by way of an increase in the supply - bitcoin actually gets scarcer every four years because of a unique phenomenon called "halving".
The "halving" is part of bitcoin's algorithm; it's written into the software program that created it and manages it's expansion. It cuts the supply of new bitcoin by 50% every four years until it reaches the absolute maximum planned supply of bitcoin of 21 million - estimated to occur in about 120 years.