Just seems wrong to me the influence some people have and how it's affecting 'normal' people's lives who aren't necessarily using bitcoin as a speculative investment.
Such is the nature of anything with such a tiny marketcap and tiny number of users. In time, as bitcoin adoption continues to grow, as it steadily has done for the last 12 years, then the volatility lessens and the ability of any one individual or institution to cause large swings in the price is also lessened. Bear in mind that the scenario you have described is and has happened to billions of people the world over already with fiat. Thanks to inflation, then enough fiat to pay your bills this year will not necessarily be enough fiat to pay your bills next year.
It also depends on how people are using bitcoin. If the family in question is buying a set fiat amount of bitcoin each week, or is being paid in "$x a week in bitcoin", then it doesn't matter if the bitcoin price of their bills goes up or down as their bitcoin income will also go up or down to match.