Flash Marriage Becomes Favorite: My husband is a Billionaire - Reviews

"What are the nine of you going to do now?" Luffy asked himself as he stared at his crew through narrowed eyes. Just as the group was approaching Alubarna Luffy noticed three of them began to slow down before pulling away from the group and hiding behind some rocks. Luffy immediately stopped the cloud and had it hover in between the two groups. "Now what do we have here?" he asked himself as he stood up and began using his observation haki.

All that glitters is gold

I have a question author,,,,if he has infinite money system, he should also be able to generate mana crystal infinitely like gold, because later in the story when he advanves in higher rank gold will be meaningless for awakeners, only things like crystal mana or stone thing like that....