I, the Alchemist, Get Stronger by Spending Money

Waking up, Feng Yin transmigrated to the world of martial arts where strength prevailed.
He became an alchemist.
Although his talent for alchemy was amazing, his martial arts qualifications were mediocre.
Luckily, he awakened the system and became stronger by spending money.
"Spend 10,000, sword skill will be improved."
"Spend 100,000, sword intent achieves minor success."
"Spend a million, sword dao perfection."
"Spend ten million, recast innate sword body, and merge with the sword."
...
Since that was the case, Feng Yin decided to silently refine pills and make money.
Then he would silently spend money and become stronger, toward the supreme.
When his schoolmates were all cultivating, Feng Yin was selling pills everywhere.
Until the invasion of the Ten Thousand Races, when everyone thought Feng Yin was just a medicine dealer that scammed people.
His sword opened the gates of heaven and no one could beat him.