There is minimum or we can say zero risk involved if we talk about investing in Bitcoin. It's just an inner fear or trust issue which one has to overcome and start investing in Bitcoin, rest is a smooth journey. We have discussed and seen many cases of investing in Bitcoin for longer duration, as long as someone intent is to HODL Bitcoin for 5 or more years he is bound to get good return.
This is not true, and I disagree that this is what you should be telling people who invest in Bitcoin, especially those who are new to it or unfamiliar with it. You might entice them with the wrong information. We are all lovers of bitcoin and all investors of bitcoin, but that doesn't mean we should send the wrong message.
If you said "minimum risk". I might agree, but "zero risk" is wrong.
There is a risk in bitcoin, you might not see it, but that doesn't mean it's not there. There are certain levels of cyber attacks that can affect bitcoin prices. The internet is crashing in certain parts of the world, or being attacked, which can affect bitcoin prices drastically. We can wake up any morning and hear devastating news that can send bitcoin from over $100k to less than $20k. I'm not saying it will happen, but there is always the possibility.
There is even the cyber-attack risk you incur. We've heard of people who got hacked and lost millions of dollars. All those are risks. The fact that it is be avoided doesn't mean it's not a risk.