If it is their own will to invest in crypto then why not? As long as they understand the risks and they are willing to invest long term, i would gladly welcome them to crypto business.
Recommending to a family or friends when the market is crashing is more challenging because we need to prove them that what we share is true. This state will help you identify who trust you well. Most people are very skeptical that they want proof. But it is good to recommend them once the price recover.