Hello,
Here is what I would do with those 5K€ based on the own experience of an old
jerk timer:
If you really have that amount, don't invest everything right away coz unlike what people say, you never know what your future gonna be and what will happen to the Bitcoin ecosystem: gouvernements could hunt BTC owners, rate could collapse, etc.
Split that amount in 5 years, ie you gonna invest 1K€ a year; so now lets say you have 1K€ to invest in 2017. Put those remaining 4K€ to your saving account which could yield to 0,5-2% of interest a year, depending of your bank/country. I would do that coz maybe after few months your mind could change, or something could happen: you could get divorce, have health issue, loose your job, buy a new car, or wanna leave the Bitcoin world. Nobody's perfect
But finally, keep in mind those remaining 4K€ are still an investment you plan to do in the future (maybe). So keep them on your saving account, they won't be eaten by the yearly inflation.
Now with those 1K€, you have an accurate view of the investment you wanna do in 2017, and if you are here in Bitcointalk, this means you wanna invest in BTC, right ? So here is the way you should do:
Every month, buy 83€ (1000/12) of Bitcoin and put them on your cold storage wallet (or else villains could steal your precious euros
Do that every month so that Bitcoin volatility won't kill your investment. Remember today Bitcoin is about 1100€, but next March, its rate could be 1500€ or 500€ as well; you don't know and those one saying the rate will go up are lying like the one saying the rate will go down too: nobody knows. So if you choose investing 5K€ right know, you have 50% of chance of loosing your bucks. That's the reason why its safer to split your investment and let what should be your best friend helping you: time
Put those amount in an Excel or Calc spreadsheet so that you know the exact amount you buy and what is yielding at the time you are checking it. You will see your investment will grow month after month; but don't be surprised if your amount decreases. Remember, Bitcoin rate now is getting higher and higher but if you come back last 2014, your investment dropped during all the year. Nevermind, coz now we are in 2017 and what you invested in 2014 are winning batch.
Take your time and after a while, you will see some of your batch are winners and some other are not, that's life and market, you should not worry about it.
If one of your batch yields to a 30% profit, take it; remove it and consider it as a gain. When I say 30%, of course this is one of the figure I am using now but your figures may be different of mine: you could be greedy (50%) or prudent (10%), its up to you. But never forget: one day, you must have your profit.
So, that's the way I would proceed with a 5K€ of Bitcoin investment. But I would remind you, those are my figures which are not yours: you don't wanna wait 5 years term, don't have a 30% profit, etc. You need to adjust them according to your willing and of course your personnal life and expectations; but never forget the secret: time will always help you.
That's the way I have been doing for years now and believe me: I am making money.