That's an absolutely terrible idea. You risk losing family and friends for giving them investment advice without even using tentative terms.
If people's only aim when receiving Bitcoin is for the price to increase, then there are no fundamentals and that situation sure as hell couldn't last forever.
Since we can no longer recommend people to use Bitcoin for the purpose of avoiding fees and delays in transactions, this is one of the few advantages that a regular person can benefit from using Bitcoin.
That is
not an advantage of using Bitcoin. That's just from the fact that more and more people are getting involved. If those people's only reason for getting involved is that the price will go higher, then as soon as it reaches a point where no more people are getting involved, people will start selling because of the low "returns" that they're getting on their digital cash.
At that point it's no longer any kind of currency, just the ultimate speculation for traders/gamblers.
So I do not see a problem with that. Obviously it is not entirely correct to recommend receiving all your money in Bitcoin, but investing as much as 30% of your monthly income does not seem to be such a bad idea.
Nothing to do with how much you can invest into it. It's about why you're doing it and whether you're actually intending to spend. It's also about being tentative when referring to the price, because past returns do not indicate future gains. With that as the only indicator the people you're talking to will piss you off if it doesn't happen.
Or what else would you say about Bitcoin to someone like your mother to make her want to buy Bitcoin? Why should she care about having a decentralized money that isn't accepted in the market she goes to buy cleaning products for her house?
That's a pretty annoying generalisation about mothers. You either talk about decentralisation, you talk about
why fees are high and how this can change, or you (unfortunately) direct her to an alt. This is how you would talk to anyone.