Seem to have had a revival more recently though the Guinness World Record is 48,000

Variously called Wish Trees, Coin trees or often Coin Logs being more accurate. They are in obscure places often on footpaths. I first came across one on a little used path 10+ years ago. As one observer pointed out, the UK coins are post decimalisation, rather dating them.

As Mr Guinness points-out:
People were hammering coins into trees – known today as "coin trees" or "wishing trees" – as a healing ritual or for wishes in Ireland and Scotland during the 19th and early 20th centuries. The custom resurfaced at the start of the 21st century. Coin-trees can be found across Great Britain and Ireland, often in the form of logs lying next to woodland paths.

Anyone else come across these latter-day folklore/pagan rituals?