It's only secure if attackers have < $2 million in resources, or the contest expires within 2000 years for an attacker with 1 PC. Or... and this is a big OR can

It's only secure if attackers have < $2 million in resources, or the contest expires within 2000 years for an attacker with 1 PC. Or... and this is a big OR can't position themselves between you and the recipient. eg. You aren't using Wifi, your network is fully secured, no one has access to any router along the way, etc. Lets put it this way, if you're using Telegram / MarlinSpikeGram and you and I are in the same coffeeshop I can read your messages.