zygarde pokemon cards (71)/131 SM Forbidden Light Evolves from null Type Mega Zygarde ex SR 097/080

That should tell you a fair amount about the quality of condition that the Bubble Mew (or other card you're looking at) is in

Best practices for Storage & Preservation Individual Card Protection : Advise customers to use top loaders or magnetic card holders for individual high-value cards

Because of their rarity and demand, these cards are ideal for long-term collecting and investment

See how strong this fun thing can be leading a deck with goad to force the attacks or Group Hug to make them want to or Pillow Fort to strongly suggest it

What you can respond to is effects that cause a coin flip to happen in the first place