英文關鍵字
absence
advantage
bank
belong
bitcoin
blockchain
challenge
coin
cryptocurrency
cryptography
decentralize
digital
ecommerce
economy
electronical
equivalent
exchange
fall
farm
finance
financial
golden
heap
international
investment
market
material
metal
mine
monetary
motion
payment
peertopeer
rich
slow
system
trade
transaction
virtual
wallet
wealthy
web