Price will remain at 600 - 700 range for a long time
Market is market, Dutchy. You can't tell. When big investors step in, it can go fast. You have seen that previous weeks also. Big walls were eaten fast. Market will probably test the 700-800 levels, i think next days. But that is just my thought. We'll see, maybe you are right as well

What is the best way for my friends to get coins? Litebit or cheaper to buy btc and buy on bittrex?
Litebit is a good deal for buying at once for 1 price. They take some margin, but they buy up for you to higher levels on the sellside at bittrex as well for the same price. So when the amount for sale on the sellside is low on the level you buy, you get all the coins for the same price, even if they have to buy higher for you. They buy in steps. Say you buy 10000 NLG and there is 1000 NLG available on the lowest sell, they buy that 1000 first and wait for a few minutes. When nobody sells to them on bittrex, they place the bid to the next sell level, until your buy is filled.
Also when buying at Litebit, look at the price on the sellside of bittrex. Litebit buys from the sellside, so when you buy there look at the sellside price of bittrex when it is lowest and you think it is a good level to buy.
For smaller amounts or just when you have patience enough for bigger buys you best act on bittrex itself. But that takes a lot more time.