when bitcoin increases rapidly, the market will also increase because almost all alt coins have a bitcoin exchange.
so if the bitcoin price is high then the alt coin will also adjust bitcoin.
so obviously what we need is only increasing bitcoin then all alt coins will also increase as well.
bitcoin as main cryptocurrency could be main psychology and trust indicator for other altcoin.so if bitcoin demand or price was recovered it will followed by altcoin.their are confidence with this condition.
Yeah it is natural when the price of bitcoin rise the market will go up also because people will take interest in bitcoin and Altcoin and thus the investment cap will also increase. It is also the attitude of business when the demand raises the price will also rise and when price rises the market cap will also rise. All these depend on each other.