Do you think putting your hands into multiple startups is a wise choice?

At first glance, No. However, it may be acceptable depending on the tasks required to achieve each milestone in starting up and operating the business. Who is responsible for what? How long does it take? When does actual work need to occur? e.g. If you are starting up a mobile application services but you have the technical team on board while you are in charge of marketing nad BD then you might have spare time to also work on another project.

But generally I do not advise it. Stick to one project. Let it stand on it's feet, grow it and perfect it as much as possible then go to the nest project when it has reached auto-pilot stage.

Money and wealth will come with the right mind set and "patience". People less greedy than others tend to have a longer term vision than others and I think they end up being more successful.

You want to be 'Jack of all trades, master of one... at a time' :)

only if you can handle it or thats what the work need

sometimes we need to do many things in the same time to Reach the same target or goal

but its not always work