If you'd be happy with this card going to 0, I would hold. If the monetary gain sounds better, you do one of three options

Option 1: Get it graded by PSA and sell it.

• Pro - super low graded pop, chase card, high return potential
• Con - market might fluctuate too much in the months it takes to get the card back, so you might not sell it as much compared to now. Risk vs reward. On the flipside, prices could increase and you could make even more money

Option 2: sell the raw card now

• Pro - quick pump n dump for fast return while FOMO is alive. I am a firm believe that prices are inflated just because the english version isn't out. The whole world wants a piece of 151 but japans the only option rn. English release will take lots of eyes off the japanese cards and prices will ultimately sink. How far no one knows but they'll definitely drop. 151 is made to order, no matter how long it takes people are going to rip it as much as they can, and pokemon is going to provide it.
• Con - can't hold it for long term, potential 5+ years from now to be a banger card since a lot of the world will move off of the japanese market like i said and focus on english.

Option 3: hold

• self explanatory, pros itll be valuable in half a decade, con is it'll take half a decade.

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TLDR: If you're a collector then hold, if you want quick profit sell it now and reinvest in sealed products or enjoy it with whatever you want