just look at the alt section, there is no competitor among them for bitcoin, the only one could be monero, nothing else
from this point of view bitcoin future is without obstacles...
Monero could be potential competitor for bitcoin, as it provides anonymous, untraceable transaction.
Ethereum could be another one as it offers a totally new platform.
maidsafe also can be another competitor, i forgot bout that, but they offer something different than bitcoin, they for example could use bitcoin for their platform, so they are not really competitors...