That is a very safe approach, or I can say a safe betting strategy. Most users apply this strategy because it can give you a maximum success rate for your bets. You wait until the end, and when you are totally sure about the results, then you place your bet. This will be the best strategy for new users who want small profits. However, the drawback of this strategy is that you can only place a large stake because of the low odds, and if you lose, then all your profits can be gone. Sometimes, at the end, unexpected things happen for example, in the last two minutes, players can score one or maybe two goals, which will result in a loss for your bet. So keep this in mind too.
I won't consider it safe, though.
Like I said in my previous post, the whole thing might look safe and like a good strategy until you finally start using it and you experience your first loss; that is when you would realise that just that single loss has set you back a huge amount, and all that you had manage to save or earn from all your previous wins are not even enough to cover it.
Do not forget the fact that you need to stake a huge amount since the odds are usually very low, so it even exposes you to the risk of losing an even larger amount each time you are gambling.
It's just what I thought too when I first tread on the post and compared it to a single bet option I found no much difference in them because at first they both look safe but its until it's being tried on and that's when the results reveals the real risks underneath. Many gamblers get excited to test every strategy they come across without critical looking at the risk that might be involved and not just what it offers as a potential returns that can be made simply.