It's a burden for investors to sign an NDA. They don't.
When you're sharing your projections, don't be worried.
Where there is concern is if they ask about your customer pipeline.
If they ask - you can give them a redacted version. Instead of saying names/companies, you'd say "We're talking to a SVP-level target at Fortune 100 tech company"
They care about the caliber of customers and estimated contract value.
If an investor has earned the right, you can invite an investor to customer calls. Be protective of your customers' time - so wait to invite investors until they are serious / committed.
"Other VCs have shown the value of their network by introducing us to customers they know. If they are customers you want to connect us into, you're more than welcome"