I LOVE this app, but it's run by 2 guys with a paid base that I question is large enough to sustain them in the long run. I can't trust my data (my life?) to a

I LOVE this app, but it's run by 2 guys with a paid base that I question is large enough to sustain them in the long run. I can't trust my data (my life?) to a web-app like this, when you have stable systems like Evernote, Asana, or even Trello that are going nowhere for the next few years. Will Workflowy be there a year from now? Can you trust that if hacked your data is secure? I'm not 100% sure. Still, I hope they can create a stable business with sustained growth because it's such a great great idea.