Extending this further, based on the stated value it looks like he probably had 40 or 50 ethereum. He might have bought them for a fraction of today's price - say $50 - so might only be out $2500 based on cost at transaction time...
Your analogy is different. They bought for X, then when it was stolen it was worth 80k, and at this random time today, it's worth $120k and he's saying he lost $120k.
Value is arbitrary, and only crystallises at liquidation. I have a painting I paid £300 for. Works by that artist are now selling for £10000. Does that make my painting worth £10000? I can send it to be appraised but even if it is valued at £10000 that value could only ever be realised if I send it to auction. If I wait too long the artist may fall out of fashion and the work may be worth less than I paid. The real value is the pleasure it gives me each day when I look at it. Is that worth more or less than £10000?
Be that as it may, it's missing the illogical point the other person raised. If your $300 painting was worth $10k when it got stolen from you, but 7 years later the market value is $1M, you don't say "I was robbed of a million"