To create gold you need to fuse or divide atoms both need nuclear reactions. The process of using bacteria cannot create gold but only to purify it.
ure wrong, anything that can be created in nature can be lab recreated, im not saying there is some gold version of Walter White, but even tho its not doable now, it surely will be in the future.
And when it comes to gold investments, the only this people think is investing in the future, and with this you just have another proof that progress is being made, so once again; its only a matter of time until they become able to produce it in lab.
cheers