Same answer as on Twitter.

Nobody who has held Bitcoin for more than 5 years can tell you that they've lost money/value. Bitcoin doesn't go down, only up for +14 years straight.

They're also not buying or investing, they're executing a foreign exchange from one currency to another. Perhaps show them some inflationary charts of the alternatives they have. Namely the USD and/or the EUR.

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Not added on twitter, tweet cap:

Bitcoin might be subject to short-term volatility which is partially related to the correlation to legacy markets because some people still think Bitcoin is a commodity but at one point Bitcoin will detach from the legacy markets and at that point EVERYONE you talked to and who didn't exchange their fiat money for Bitcoin will have huge regrets.