Just because you have been lucky so far and managed to make some profit doesn't mean this strategy will always work. It depends mainly on the coin/token you are going to buy. Some coins, if not most of them, die and their value drop to zero even before getting listed on one of the reputable exchanges.
And when you buy one of those new coins, you will have to check its value on a regular basis to know when is the best moment to sell it. Usually it won't take up to two or three months before its price starts dropping.

As far as newbies are concerned, I would not take risks with new coins. How can they understand the potential for a coin to grow? Investing in bitcoin is a completely different matter. It will grow, no matter what, you just need to be able to wait. But with the rest of the coins, blind investing, without knowledge, can, on the contrary, completely discourage all desire for investment. If everything were so simple, I think many newbies would be sitting with their pockets full, especially at this time when new coins appear regularly. But only a few of them give any plus

why quickly? I mean, every piece of advice from long-time successful investors is to play the waiting game, take it long and take your time. That yields the best results. Quick turnarounds either require an enormous amount of skill and know-how or an enormous amount of luck. Look, you might get lucky, but there is always a safer route to take.

You can buy Bitcoins worth the amount you have and Indeed any amount at all, you must not buy one Bitcoin or an amount too much, infact when investing you're supposed to invest with only what you can afford to lose, so you also have to check yourself on that. You can as well slowly increase your Bitcoins, you do not have to buy it all at once, you could find a strategy at buying at intervals that suits you, and before you know it, in a few years time, you'll have a good amount of it.

Having said that, Bitcoin is a long term investment, but it's much better than gambling with short term/pump and dump coins that if you fail to get it right, you lose all your funds, it's much better to gradually make profits than to make none at all.

You can buy Bitcoins worth the amount you have and Indeed any amount at all, you must not buy one Bitcoin or an amount too much, infact when investing you're supposed to invest with only what you can afford to lose, so you also have to check yourself on that. You can as well slowly increase your Bitcoins, you do not have to buy it all at once, you could find a strategy at buying at intervals that suits you, and before you know it, in a few years time, you'll have a good amount of it.

Having said that, Bitcoin is a long term investment, but it's much better than gambling with short term/pump and dump coins that if you fail to get it right, you lose all your funds, it's much better to gradually make profits than to make none at all.

Sure that's a good strategy— if you can actually time the buys AND sells really well; not to mention if you can actually pick the right coins in the first place. If not, then you're likely to just end up having far less money compared to when if you just simply held BTC.