Is a (Dedicated) 4mbps line good enough for PS4?

Googling a bit regarding those games I've found that for example, Fortnite needs at least 3 Mbps download speed and 1 Mbps upload, but the best results come around 10 Mbps (more info), I believe that similar requirements are for similar games (unofficial data for PUBG recommended around 4 Mbps).

However, in online gaming, the bigger issue is latency and quality of the connection (number of lost packets, the stability of connection). The first one relates directly to your physical distance to server: for example, it is very hard to get ping below ~200 ms from New Zealand to any USA server, the second depends on your provider. Will it be better than shared 10 Mbps? Yes. Will it be enough for competitive gaming? Maybe.