Of course, it is suitable to buy a bitcoin if a price of it is low, just like the last month here in the Philippines that a price of a bitcoin cost only P360,000, it is a best time for me then look now that it reach 1,000,000 in pesos.
May it be Philippines or any other country, the best part of the bitcoin is that it is decentralized and it has nothing to do with the local currency. Moreover, the price of the bitcoin is same all over the world at a same time and the exchange rate is also uniformly defined around the globe.
Now for how much you are purchasing matters, because it is very likely that after getting the profits, your capital will be doubled within no time (3-4 months aprox).