Addiction requires a cage being attempted to be escaped. Porn and drugs are similar in the sense of trying to escape some sense of personal hardship. Both porn and drugs are an effect, not the cause.

Money and gold have value because they can be exchanged easily for goods and services that are really wanted. As long as crypto currencies make it hard to trade for goods ands services, they will be, at best, a fad, at worst, a scam. There needs to be market for crypto to work. All I see is promises, no real commitments to it.