Why did someone bury 70,000 Celtic coins 2,000 years ago?

‘Last coins excavated from huge Jersey Celtic hoard’

“When Reg Mead and Richard Miles found the hoard after 30 years of searching the same field because of a story they’d heard from the previous landowners daughter, they only dug down to the surface of the mass of coins before alerting Jersey Heritage so the professionals could take over the excavation. With such a great quantity of coins corroded together, archaeologists dug the entire hoard out of the ground in a single soil block measuring 4.5 x 2.6 feet and weighing three quarters of a ton.”

http://www.thehistoryblog.com/

The story does not conclude with “Why the coins were buried.” Rats.