you can afford to lose a day or two

Yes, he did post about to gifting them to Barry Keoghan, the actor portraying him in the upcoming films, as a good luck charm for his role. However, the photo he posted was of him handing Keoghan a small leather sack, while elf stones famously erode all kinds of skin. Additionally, Ringo is on the record (I think? I swear I read this but I can't find the interview. Please reach out if you know what I'm talking about) that he keeps the stones away from cameras to prevent power-dampening effects.

It's likely that what he gave was a pouch of prop elf stones as a show of good faith, which could also be related to the old legend that a false elf stone will become real in a moment of need. Some people when presented with this evidence claim that while the photo was staged, the real stones were handed over in private, but this seems far fetched to me, especially since it's widely accepted that Ringo bound himself to the stones for nine and ninety years when he acquired them.

*flashback to mentor during hero's training*

lying (overshooting): feel old yet? the first episode of spongebob aired 36 years ago

lying (undershooting): feel old yet? the first episode of spongebob aired 7 years ago

lying by a ridiculous amount (overshooting): feel old yet? the first episode of spongebob aired 900 years ago

lying by a ridiculous amount (undershooting): feel old yet? the first episode of spongebob aired 15 minutes ago

real date of event no one reading was alive for: feel old yet? the great san francisco earthquake happened 118 years ago

real date of event no one reading was alive for or cares about: feel old yet? prince frederick henry died 395 years ago

event no one reading was alive for and also lying: feel old yet? the great san francisco earthquake happened 4 years ago

event that did not happen: feel old yet? brian mulroney was assassinated 48 years ago

event that did not happen and even if it did this would be a lie: feel old yet? brian mulroney was assassinated 197 years ago

real date of event on a cosmological scale: feel old yet? the sun was formed 4,600,000,000 years ago

lying on a cosmological scale (undershooting): feel old yet? the sun was formed 12 years ago

lying on a cosmological scale (overshooting): feel old yet? the first episode of spongebob aired 12,000,000,000 years ago

real date of a personal anecdote that only you know or card about: feel old yet? i made a really good stir fry 5 years ago

reversal: feel young yet? frozen 3 is coming out in 3 years

reversal on a cosmological scale: feel young yet? the sun will collapse in 8,000,000,000 years

reversal (lying about event): feel young yet? the first episode of spongebob will air in 3 years

reversal (lying about time, overshooting): feel young yet? frozen 3 is coming out in 8,000,000,000 years

reversal (lying about time, undershooting): feel young yet? the sun will collapse in 3 years

reversal (lying about time, really undershooting): feel young yet? the sun will collapse in 12 minutes

real date of a recurring event that wasn't very long ago: feel old yet? halloween was 13 days ago

lying about recurring event: feel old yet? halloween was 10,000 years ago

reversal of recurring event: feel young yet? thursday is tomorrow

reversal of personal anecdote: feel young yet? my laundry is done in 52 minutes

real(?) date of a nonspecific event: feel old yet? something happened 2 years ago

lying about the reader (undershooting): feel old yet? you were born 5 years ago

lying about the reader (overshooting): feel old yet? you were born 650 years ago

making a reasonable guess about the reader: feel old yet? you were born 22 years ago

technically telling the truth about the reader: feel old yet? you were born between 0 and 120 years ago

threatening the reader: feel young yet? you will die in 7 days

non sequitur: feel old yet? half of all chameleon species on earth live in madagascar

non sequitur (lying): feel old yet? chameleons are immune to fire

lying on several levels: feel old yet? chameleons were invented 36 years ago

self-reference: feel old yet? i started writing this post 40 minutes ago

giving up: feel old yyet?th e emmenkr,tn dbw a 8 gn m hk\

i can't finish the joke someone else come up with a punchline: feel old yet?

declarative statement: you feel old.

subversive declarative statement: time isn't even real.

reference another meme: feel old yet? yeah. this is the beach that makes you old.