Nothing will ever be a coincidence.
Sometimes when we get surprised, we may say, "What a coincidence!" Actually, that is kind of wrong because everything that happens in life is planned. There is always a reason why things happen in our lives.This is also the same as luck. Luck never exists. Sometimes I say "Good luck" but sometimes it's better to say "May God bless you." This is because it is God's choice to bless us or not. But no worries about God not blessing us, because there is always a reason why God gives us problems and challenges in our lives. That reason would either be because He wants us to let us realize our mistakes or because he wants us to be stronger and better spiritually and physically for the future.
So in life, don't always take things as coincidence, take them as plans of God. Accept these as blessings in life and thank Him for these even if they are bad because there must be a reason they happen. Just like what I learned before: failures, challenges, and problems are gifts.