Please tell me what do you think will happen IF If in 8 years we have negative growth but a 2mb or even 8mb blocksize?
Will transaction fees alone be enough to secure the network?
Will miners process torrents of spam for dust?
Will our network be stronger or weaker?
Are you willing to risk everything on the unfounded assumption will continue to grow, grow at a never before seen rate and for years?

What do you think happens if your wrong?