logia devil fruit please!

whats so wrong with being a wimp? this is a guy from modern earth.. and any dojo/gym activities cost money. where would he get fighting exp?

the story background setting is quite good... but the ability to just to age faster is soo stupid. Why would you wanna accelerate your own time??? other than age faster faster death I personally dont see any benefits. If your latent potential is 5/10 event if you accelerate your own time untill near old age with freckles but your latent potential still remains unchanged still 5/10 .. haha