2) If The Bitcoin Network is Not Strong Then Your Transaction Also Becomes Slower.....
You never need to worry about the strength of bitcoin network so that there would not be any bottlenecks on transmitting your transactions.
Bitcoin network is already secured by more than enough hash power with respect to current volume of bitcoins being transacted. The equilibrium of bitcoin network will be definitely always maintained as lot of people are always interested in mining process. We never need to worry about this at all.