Guys I dont know what to do, should I invest in Gold or Bitcoin. Gold is more stable I know. But the bitcoin development is crazyy, imagine if you have bought it before 20 years...

Bitcoin is finite, and Gold is finite.
However, the rate at which they are introduced into the world is very different, which affects scarcity.
As time goes on for Gold, technology advances and getting Gold out of the earth becomes a lot easier. It is not predictable and uncertain.
As time goes on for Bitcoin, there is a decreasing amount introduced due to block rewards being halved. It is predictable and certain.
I know my pick, go with Bitcoin.
It is no casual choice. This concerns value's and money's future. GOLD? It had a good run. Shiny, well-liked, and with history. But the world is changing.
We've got technology digging up more and more gold every year, so is it really that rare anymore? Bitcoin, thats a different story. It is safe, limited, and constructed on an immutable, transparent system. Folks, this is gold standard 2.0.
So, whats it gonna be? An antique relic thats losing its luster, or the future of finance? Where Im investing my money is known. Bitcoin is a gamble on a better, more predictable financial system as much as an investment. Thats an investment in the future.
If I had to choose only 1 of the 2, I would also choose bitcoin because it offers more essential use cases for me and offers much better returns than gold. Between gold and bitcoin, I think bitcoin is much better for my needs but I don't think it's a bad idea for someone to choose gold and it depends on their needs.
But what evidence do you have that gold mining is getting easier and what evidence does gold no longer have to be scarce? Because just looking at gold's chart, it's not growing as fast as bitcoin but it's clearly still growing steadily every year, which shows that demand is still higher than supply. Furthermore, gold is used in many different industries, not just as a storage asset, so I don't think there will be an oversupply of gold as you said.
According to some news I know, there is not even enough gold for the Chinese and Russian governments to buy, and the US is the country that holds the most gold in the world. Why don't they compete to buy bitcoin but instead compete to buy and store gold?