I've been tossing around the idea of starting a group of people who are committed to buying Bitcoin every month. Can be a small portion, like 5$, or however much people can afford (I suppose it would make sense to use higher amounts for fee reasons, though). I myself have set up a monthly wire transfer from my bank account to Coinbase and a recurring purchase of Bitcoin every 1st day of the month. This is really simple, and you keep investing and $-cost-averaging your BTC purchases.
Who's in?
I created a Google Form where anyone who wants to "join" can do so: https://forms.gle/rjD81677yipAVhtaAThis is too risky and not sure if this will work out in this volatile environment as what you are planning involves money from a group of people.
No, it's not risky at all if you know the price fluctuations and plans to hold for the long term, at least we know bitcoin will reach over $20K next year or in 2021.
you will be held responsible if things don't go well because most of them might not invest small amount due to the transaction fee as you have already mentioned and there are some people who might be concerned about their anonymity as well.
No, he's not responsible to anyone or anything.
People who decide to buy bitcoin at their own discretion, @grintsch doesn't compel anyone to join the club nor he holds other's bitcoin.
You simply buy bitcoin and keep it in your wallet.