First : You can't bootstrap more than one components , it doesn't make sense.
You'd only bootstrap one root component.
Second : If you wan't to load a component lazily/dynamically , you'd need to decide in which place that component should be created/loaded dynamically and then take it from there.
Third : A dynamic component should be in declaration of the module and in the entryComponents.
There are heaps of tutorials out there related to how to load a component dynamically , one would be
Angular2 RC6 - Dynamically load component from module