1. Being able to purify minerals out of ore with vibrational means. In other words, extracting easily, the mineral you want. Got a pile of iron pyrite, well, 1/13th of it is gold, so you can basically get almost all the gold you want.
2. Being able to create minerals out of plasma. So, if you want some gold, you start with plasma and add the vibrations that are gold, and viola, you have as much gold as you want.

So, you are correct, in the future gold will have almost no value.
And as a monetary metal, it will have very little value in the near future.

1. Gold will spike as the currencies collapse. Gold will buy food. People in america will be out panning for gold to buy food, just like they are doing in Zimbabwe now.
2. Gold prices will stabilize along with cryptos at atmospheric prices
3. Gold prices will collapse as the next version of cryptos comes out. Gold will be shown to be a very poor form of money. And a very poor store of wealth. (it will be mathematically proven)
4. Gold prices will be almost zero except for jewellery. As people wake up to the knowledge that the controlling families control all the gold, and have been hoarding it for centuries. No one will touch that gold as payment.

This will happen over a short time, probably not more than a generation.