you are right, i would defintiely be buying my bitcoins on a crash and then selling on a huge price growth, though thats not too big of a plan as it might not work too

Yes indeed it can be profitable and I also do it. But to get more and more we have to try other means such as trade, investment, or sell services. The most important thing to be rich have to try hard.

my plan still same like last lplan.
holding arround 0.05-0.1/week then waiting for reaching 100bitcoin
i hope i can get that's amount every week. now im traiding in mining, i m sure in future bitcoin will reach $1000 again.

It is really great if you can earn 0.1btc in a week, it would take you just 10 weeks to reach 1 bitcoin which would approximately be 2 months in a half, and after you reach that amount you should start trading altcoins by having some experience at first and for that you should start with a small amount and later on you should do it with bigger amounts.
Altcoin trading would make your process faster for reaching your target.

In my opinion there are many methods and ways in bitcoins how you can become rich. But best - buy and hold

Are you really hoping that bitcoin again go up as fast as it was at the beginning of the year? It is clear that the market is going that something strange. For example in Japan massively buying bitcoin, and why this happens is not clear. Looks really the price will go up.

Exactly if you want to get rich with bitcoins then you need to hold higher amount of coins so even if price doesn't reaches to the roof you still have an chance to get rich with it.

There is not much chance of crashing bitcoin price unless get another event of MT gox or Bitfinex hack. The price will increase slowly and we can even see bitcoin to 5K in few years from now.

Yeah $5k can be achieved in future but we don't know when the exact time will come so its better to keep busy ourselves in earning bitcoin to best possible extent.