Most of the time it's not your website that's prone to crawling but all other places. Any registry or 3rd party service that will have a data leak.
If I were you, I would present my regular gmail address. Perhaps it doesn't look "professional" but has the best spam filter that's available on the market.
For real clients for whom you run presentations, you can use expirable one time links dedicated for each client. You put your professional e-mail there. And on the business cards.
My personal, statistical not-significant experience of some (accidental) A/B-testing is that crawlers are a bigger problem than database breaches, especially considering the fact that most of the spam messages were explicitly targeted to businesses.
Or use G Suite for business and get the best of both worlds?
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