In my opinion managing success is another skill we need to master. Becoming successful is attainable with the right tools and attitude - enjoying it and continuing to grow seem to be very difficult for most of us.
When you get more and more of what you want the possibility of loss and the fear and worry that goes with that can really take the shine off the success you worked to achieve.
Still, you are very fortunate in that you know how to release. You have already demonstrated this and now you are aware of the fear of loss feelings. This is all you need to move to the next step....
Firstly, pay attention to the fears and worries and remember they are just feelings and you can let go of any feeling. Drop them one by one as they pop up - this only takes a moment during the day.
You could also go to the underlying wanting a/c/s to shift things more quickly.
Secondly, set new goals for all aspects of your life. Keep aiming higher i.e. repeat the formula that got you to where you are now. Because you are not looking forward your mind is not focused - idle minds are fertile ground for fears and worries!
Thirdly, notice the source of your wealth. It is not a job; it is not your career; it is not the economy, it is not dollars. Your are cause the rest is effect. the source of your wealth as you have demonstrated is the ability to hold in mind what you want before letting it go to allow it in.
Consequently, even if you gave away every penny you have nothing could stop you from allowing in all the wealth you decide to have. The same applies to friendship, love, health, happiness and peace of mind.
The external world is effect not cause - once you get that concept you´ll be much more care free about money - the more real people believe money is the harder they work for it and the more effort and stress it takes to get some.
Prove this is true in a small way and then keep expanding....