Hey @Iva. Sorry about the late reply, i was away camping!
In regards to your question... maybe. It will depend on how much you are going to spend each day (food, drinks, souvenirs, entrance fees etc). Some days you will spend a lot, some you wont. What I did was I looked at all the prices of all the optional activities and budgeted from that. I worked out that if i did all the activities plus skydiving it would cost around $1300 AUD, and around $800 AUD if i did everything but went up Jungfrau instead of skydiving. I did all the optionals but the dinner and ballet in Vienna (I think).
So I budgeted 30 Euro (50 AUD) per day x 49 = $2450 AUD
All optional extras + Jungfrau = $800 AUD
Extra money about $1000
Money for London about $600
In all I remember putting $4200 in my account to use. I came back with about $1200 to spare. But then I didnt spend a lot on extra stuff. Some people on my tours probably spent $5000+ on the trip.
So in a long winded way it may be enough. Basically if you can bring more money do it, but you can also do it on the cheap and do all the activities if you want. I would recommend doing all the optionals and also the optional dinners because they are always fun and you get to hang and know everyone better.
Hope that helps