Too much money???

I know this is a strange question but does having a big savings pot worry anyone? I am an only child and about 7 years ago the last of my parents died leaving me the family home which I then sold - they would never have believed what it was worth considering what they paid for it! I now have more than enough money to last me but it worries me so much - how and where to invest it? - I try to invest in things that I think they would have approved of but it is such a nightmare having to move accounts around trying to get the best rates etc. I feel it is my duty to make the best use of it as they struggled to buy the house all those years ago. I know I could give some to charities which they were interested in and I did that at the time as well as giving some to the grandchildren. I know I should be grateful that I dont have "lack of money" worries and I am but having too much seems a problem too!!