A friend in the comments section asked what coins to buy. Have you heard the story of the foolish old man who moved mountains? It's about that old man who would rather move a big mountain himself than move to a new home. Moving mountains is surely easier than moving houses, at least you don't have to worry about packing, finding a moving company, or even worrying about sudden price increases from the moving company. But, upon reflection, the foolish old man is actually the one who needs to move the most in this world. If you remember this story, the old man didn't gather his family for a meeting until he was 90 years old to say: 'We need to move that mountain at the door; it’s just too inconvenient to go out.' I can't help but wonder what he was doing all those years until he was 90 to suddenly realize there was a mountain at his doorstep? Had he never gone outside? The phrase 'to open the door and see the mountain' seems tailor-made for his family! I guess he must have been too busy enjoying life when he was young, wasting time until he was 90, and suddenly felt it was about time to do something. So, he had a bright idea and decided to start a big project - to move the mountain at the door. Anyway, he wouldn't live much longer, so he might as well get the family involved and make it an ultimate challenge.