One of the safest ways to get more bitcoins (and altcoins) is to DCA into it. That means Dollar Cost Averaging and is a method to buy some asset regularly, such as weekly or monthly. Your fiat money may not be called dollars but the concept is the same and well understood.
This depends on your own situation and if you have extra fiat set aside to buy a lump sum, that may also be something you want to do, however many will advice to break up your purchase into several buy orders spaced out over several weeks or months.
Pick an amount to buy. Pick a fixed date interval, such as every 2 weeks or every month. On that particular date, buy the amount whatever BTC you can get with it.
Don't try to time the market, just put a buy order, it doesn't even have to be a market buy, but that doesn't hurt as well since at least you know what you're getting.
Finally, whatever exchange you get it from, withdraw to your own wallet. Remember, not your keys, not your coins. Do not leave them on the exchange.
I've only used Bitcoin Core and Electrum for desktops and mobile (android) devices, so those are good wallets that are highly recommended.
It seems like this is the right suggestion so far. Not only is it useful for OP, but I also get its benefits. Previously I also traded in a number of exchanges and I also keep it there. But after what you get from your advice, it seems like storing assets on the exchange is very risky.
+3
You deserve merit from me, but sorry, now my sMerit is empty.