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$70k
18 million
51 percent attacks
51% attack
bitcoin gold
block replacement
blockchain reorganization
btg
consensus algorithm
crypto51
devs
double spending
double spends
double spent
equihash
ethereum classic
gpu miners
jan 2020
markets
may 2018
new algorithm
news
nicehash
reorgs
vertcoin
zcash
zec
What
attacked
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attacks
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bitcoin
blockchain
blocks
btg
1
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deep
double
gold
january
loses
network
removed
reorg
reorganizations
roughly
spends
suffered
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