4. From what I can tell, these attitudes largely progressed through three phases. He says no. People who do this are known as miners. But its gone on to surge as much as $50,000-plus per coin.
past personally known as a miner
( z0 know :ARG1 ( z1 person :ARG0-of ( z2 mine ) ) :ARG1-of ( z3 personal ) :time ( z4 past ) )
(z0 / know-02
    :ARG1 (z1 / person
              :ARG0-of (z2 / mine-01))
    :ARG1-of (z3 / personal-02)
    :time (z4 / past))
past personally known as a miner
z0 :ARG1-of z3
z0 :time z4
z0 :ARG1 z1
z1 :ARG0-of z2