Obviously. You can't spend BTC without the private key.
And you could not give the solution to the private key of the 0.1 BTC wallet, I mean, it's already solved, right?
Maybe the 0.1 wallet is part of something bigger. Maybe it's not.
Either way, if I were to publish the steps, I would be unintentionally giving that away and it is too early for hints already.
The use of the word bigger in this sentence gives away that the answer it's in the first option. Enthusiasm about the question and people's interest makes people use words like "bigger" or other adjectives that tend to stay where the truth is in the sentence.
i will tend to believe that the 0.1 wallet answer has to do with the 0.2, 0.31 and 310 BTC wallet.
That means most probably the other 2 wallets 0.2 and 0.31 are also part of the the big answer.
Very curious about the final answer and about the difficulty of the last one... is there an end date? like one year or something?